diff --git a/servo/components/selectors/matching.rs b/servo/components/selectors/matching.rs
index 7c509e8e673c..f50dc8ddecf7 100644
--- a/servo/components/selectors/matching.rs
+++ b/servo/components/selectors/matching.rs
@@ -261,10 +261,11 @@ where
     let iter = selector.iter_from(selector.len() - from_offset);
     debug_assert!(
         iter.clone().next().is_some() ||
-            (from_offset != selector.len() && matches!(
-                selector.combinator_at_parse_order(from_offset),
-                Combinator::SlotAssignment | Combinator::PseudoElement
-            )),
+            (from_offset != selector.len() &&
+                matches!(
+                    selector.combinator_at_parse_order(from_offset),
+                    Combinator::SlotAssignment | Combinator::PseudoElement
+                )),
         "Got the math wrong: {:?} | {:?} | {} {}",
         selector,
         selector.iter_raw_match_order().as_slice(),
@@ -454,11 +455,9 @@ where
                 context.current_host.is_some(),
                 "Should not be trying to match slotted rules in a non-shadow-tree context"
             );
-            debug_assert!(
-                element
-                    .assigned_slot()
-                    .map_or(true, |s| s.is_html_slot_element())
-            );
+            debug_assert!(element
+                .assigned_slot()
+                .map_or(true, |s| s.is_html_slot_element()));
             let scope = context.current_host?;
             let mut current_slot = element.assigned_slot()?;
             while current_slot.containing_shadow_host().unwrap().opaque() != scope {
@@ -674,9 +673,9 @@ where
         Component::Combinator(_) => unreachable!(),
         Component::Slotted(ref selector) => {
             // <slots> are never flattened tree slottables.
-            !element.is_html_slot_element() && element.assigned_slot().is_some() && context
-                .shared
-                .nest(|context| {
+            !element.is_html_slot_element() &&
+                element.assigned_slot().is_some() &&
+                context.shared.nest(|context| {
                     matches_complex_selector(selector.iter(), element, context, flags_setter)
                 })
         },
diff --git a/servo/components/selectors/parser.rs b/servo/components/selectors/parser.rs
index 4dda76d32002..fa043b772a97 100644
--- a/servo/components/selectors/parser.rs
+++ b/servo/components/selectors/parser.rs
@@ -449,9 +449,7 @@ where
                 ref local_name,
                 never_matches,
                 ..
-            }
-                if !never_matches =>
-            {
+            } if !never_matches => {
                 if !visitor.visit_attribute_selector(
                     &NamespaceConstraint::Specific(&namespace_empty_string::<Impl>()),
                     local_name,
@@ -459,7 +457,7 @@ where
                 ) {
                     return false;
                 }
-            }
+            },
             AttributeOther(ref attr_selector) if !attr_selector.never_matches => {
                 let empty_string;
                 let namespace = match attr_selector.namespace() {
@@ -1366,7 +1364,7 @@ where
                     SelectorParseErrorKind::DanglingCombinator
                 } else {
                     SelectorParseErrorKind::EmptySelector
-                }))
+                }));
             },
         };
 
@@ -1634,7 +1632,7 @@ where
         OptionalQName::None(t) => {
             return Err(input.new_custom_error(
                 SelectorParseErrorKind::NoQualifiedNameInAttributeSelector(t),
-            ))
+            ));
         },
         OptionalQName::Some(_, None) => unreachable!(),
         OptionalQName::Some(ns, Some(ln)) => {
@@ -1691,7 +1689,7 @@ where
         Ok(t) => {
             return Err(location.new_custom_error(
                 SelectorParseErrorKind::UnexpectedTokenInAttributeSelector(t.clone()),
-            ))
+            ));
         },
     };
 
@@ -1768,11 +1766,12 @@ impl AttributeFlags {
             AttributeFlags::CaseSensitive => ParsedCaseSensitivity::ExplicitCaseSensitive,
             AttributeFlags::AsciiCaseInsensitive => ParsedCaseSensitivity::AsciiCaseInsensitive,
             AttributeFlags::CaseSensitivityDependsOnName => {
-                if !have_namespace && include!(concat!(
-                    env!("OUT_DIR"),
-                    "/ascii_case_insensitive_html_attributes.rs"
-                ))
-                .contains(local_name)
+                if !have_namespace &&
+                    include!(concat!(
+                        env!("OUT_DIR"),
+                        "/ascii_case_insensitive_html_attributes.rs"
+                    ))
+                    .contains(local_name)
                 {
                     ParsedCaseSensitivity::AsciiCaseInsensitiveIfInHtmlElementInHtmlDocument
                 } else {
@@ -1961,7 +1960,7 @@ where
                     &Token::Ident(ref name) => name.clone(),
                     t => {
                         return Err(location
-                            .new_custom_error(SelectorParseErrorKind::NoIdentForPseudo(t.clone())))
+                            .new_custom_error(SelectorParseErrorKind::NoIdentForPseudo(t.clone())));
                     },
                 };
 
diff --git a/servo/components/style/attr.rs b/servo/components/style/attr.rs
index 2e2372be2d71..16173d640571 100644
--- a/servo/components/style/attr.rs
+++ b/servo/components/style/attr.rs
@@ -6,7 +6,6 @@
 //!
 //! [attr]: https://dom.spec.whatwg.org/#interface-attr
 
-use app_units::Au;
 use crate::properties::PropertyDeclarationBlock;
 use crate::shared_lock::Locked;
 use crate::str::str_join;
@@ -14,6 +13,7 @@ use crate::str::{read_exponent, read_fraction, HTML_SPACE_CHARACTERS};
 use crate::str::{read_numbers, split_commas, split_html_space_chars};
 use crate::values::specified::Length;
 use crate::{Atom, LocalName, Namespace, Prefix};
+use app_units::Au;
 use cssparser::{self, Color, RGBA};
 use euclid::num::Zero;
 use num_traits::ToPrimitive;
diff --git a/servo/components/style/bloom.rs b/servo/components/style/bloom.rs
index 077efa920118..92e6b2a48b42 100644
--- a/servo/components/style/bloom.rs
+++ b/servo/components/style/bloom.rs
@@ -7,8 +7,8 @@
 
 #![deny(missing_docs)]
 
-use atomic_refcell::{AtomicRefCell, AtomicRefMut};
 use crate::dom::{SendElement, TElement};
+use atomic_refcell::{AtomicRefCell, AtomicRefMut};
 use owning_ref::OwningHandle;
 use selectors::bloom::BloomFilter;
 use servo_arc::Arc;
diff --git a/servo/components/style/build_gecko.rs b/servo/components/style/build_gecko.rs
index 22a61d1d7e42..734d09569f5f 100644
--- a/servo/components/style/build_gecko.rs
+++ b/servo/components/style/build_gecko.rs
@@ -515,8 +515,7 @@ mod bindings {
                         "pub type nsTArrayBorrowed_{}<'a> = ",
                         "&'a mut ::gecko_bindings::structs::nsTArray<{}>;"
                     ),
-                    cpp_type,
-                    rust_type
+                    cpp_type, rust_type
                 ))
             })
             .handle_str_items("servo-immutable-borrow-types", |b, ty| b.borrowed_type(ty))
diff --git a/servo/components/style/context.rs b/servo/components/style/context.rs
index 42e506777ab3..aca1d24f2eaf 100644
--- a/servo/components/style/context.rs
+++ b/servo/components/style/context.rs
@@ -4,7 +4,6 @@
 
 //! The context within which style is calculated.
 
-use app_units::Au;
 #[cfg(feature = "servo")]
 use crate::animation::Animation;
 use crate::bloom::StyleBloom;
@@ -29,6 +28,7 @@ use crate::thread_state::{self, ThreadState};
 use crate::timer::Timer;
 use crate::traversal::DomTraversal;
 use crate::traversal_flags::TraversalFlags;
+use app_units::Au;
 #[cfg(feature = "servo")]
 use crossbeam_channel::Sender;
 use euclid::Size2D;
diff --git a/servo/components/style/custom_properties.rs b/servo/components/style/custom_properties.rs
index 130c92b0e9b2..6bc2b331e35a 100644
--- a/servo/components/style/custom_properties.rs
+++ b/servo/components/style/custom_properties.rs
@@ -434,7 +434,7 @@ fn parse_declaration_value_block<'i, 't>(
             return Ok((
                 TokenSerializationType::nothing(),
                 TokenSerializationType::nothing(),
-            ))
+            ));
         },
     };
     let first_token_type = token.serialization_type();
diff --git a/servo/components/style/dom.rs b/servo/components/style/dom.rs
index eee5b9d90ef0..1c64543310c4 100644
--- a/servo/components/style/dom.rs
+++ b/servo/components/style/dom.rs
@@ -7,7 +7,6 @@
 #![allow(unsafe_code)]
 #![deny(missing_docs)]
 
-use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 use crate::applicable_declarations::ApplicableDeclarationBlock;
 #[cfg(feature = "gecko")]
 use crate::context::PostAnimationTasks;
@@ -23,6 +22,7 @@ use crate::shared_lock::Locked;
 use crate::stylist::CascadeData;
 use crate::traversal_flags::TraversalFlags;
 use crate::{Atom, LocalName, Namespace, WeakAtom};
+use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 use selectors::matching::{ElementSelectorFlags, QuirksMode, VisitedHandlingMode};
 use selectors::sink::Push;
 use selectors::Element as SelectorsElement;
@@ -42,10 +42,7 @@ use std::ops::Deref;
 /// data structures. Also, layout code tends to be faster when the DOM is not being accessed, for
 /// locality reasons. Using `OpaqueNode` enforces this invariant.
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
-#[cfg_attr(
-    feature = "servo",
-    derive(MallocSizeOf, Deserialize, Serialize)
-)]
+#[cfg_attr(feature = "servo", derive(MallocSizeOf, Deserialize, Serialize))]
 pub struct OpaqueNode(pub usize);
 
 impl OpaqueNode {
diff --git a/servo/components/style/font_face.rs b/servo/components/style/font_face.rs
index 7b911cbb76c4..38c4bb788338 100644
--- a/servo/components/style/font_face.rs
+++ b/servo/components/style/font_face.rs
@@ -336,9 +336,10 @@ impl<'a> FontFace<'a> {
                         // We support only opentype fonts and truetype is an alias for
                         // that format. Sources without format hints need to be
                         // downloaded in case we support them.
-                        hints.is_empty() || hints
-                            .iter()
-                            .any(|hint| hint == "truetype" || hint == "opentype" || hint == "woff")
+                        hints.is_empty() ||
+                            hints.iter().any(|hint| {
+                                hint == "truetype" || hint == "opentype" || hint == "woff"
+                            })
                     } else {
                         true
                     }
diff --git a/servo/components/style/font_metrics.rs b/servo/components/style/font_metrics.rs
index 031faa7c5366..0c37a4446588 100644
--- a/servo/components/style/font_metrics.rs
+++ b/servo/components/style/font_metrics.rs
@@ -6,12 +6,12 @@
 
 #![deny(missing_docs)]
 
-use app_units::Au;
 use crate::context::SharedStyleContext;
 use crate::logical_geometry::WritingMode;
 use crate::media_queries::Device;
 use crate::properties::style_structs::Font;
 use crate::Atom;
+use app_units::Au;
 
 /// Represents the font metrics that style needs from a font to compute the
 /// value of certain CSS units like `ex`.
diff --git a/servo/components/style/gecko/conversions.rs b/servo/components/style/gecko/conversions.rs
index 4dfb989f7d79..e077a9f9666e 100644
--- a/servo/components/style/gecko/conversions.rs
+++ b/servo/components/style/gecko/conversions.rs
@@ -10,7 +10,6 @@
 
 #![allow(unsafe_code)]
 
-use app_units::Au;
 use crate::gecko::values::GeckoStyleCoordConvertible;
 use crate::gecko_bindings::bindings;
 use crate::gecko_bindings::structs::RawGeckoGfxMatrix4x4;
@@ -30,6 +29,7 @@ use crate::values::generics::box_::VerticalAlign;
 use crate::values::generics::grid::{TrackListValue, TrackSize};
 use crate::values::generics::image::{CompatMode, GradientItem, Image as GenericImage};
 use crate::values::generics::rect::Rect;
+use app_units::Au;
 use std::f32::consts::PI;
 
 impl From<CalcLengthOrPercentage> for nsStyleCoord_CalcValue {
diff --git a/servo/components/style/gecko/data.rs b/servo/components/style/gecko/data.rs
index 6ac0d01f9974..af98f116afb5 100644
--- a/servo/components/style/gecko/data.rs
+++ b/servo/components/style/gecko/data.rs
@@ -4,7 +4,6 @@
 
 //! Data needed to style a Gecko document.
 
-use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 use crate::context::QuirksMode;
 use crate::dom::TElement;
 use crate::gecko_bindings::bindings::{self, RawServoStyleSet};
@@ -18,6 +17,7 @@ use crate::selector_parser::SnapshotMap;
 use crate::shared_lock::{Locked, SharedRwLockReadGuard, StylesheetGuards};
 use crate::stylesheets::{CssRule, Origin, StylesheetContents, StylesheetInDocument};
 use crate::stylist::Stylist;
+use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 use malloc_size_of::MallocSizeOfOps;
 use servo_arc::Arc;
 use std::fmt;
diff --git a/servo/components/style/gecko/media_features.rs b/servo/components/style/gecko/media_features.rs
index af166e60986c..29f5b61816f6 100644
--- a/servo/components/style/gecko/media_features.rs
+++ b/servo/components/style/gecko/media_features.rs
@@ -4,7 +4,6 @@
 
 //! Gecko's media feature list and evaluator.
 
-use app_units::Au;
 use crate::gecko_bindings::bindings;
 use crate::gecko_bindings::structs;
 use crate::media_queries::media_feature::{AllowsRanges, ParsingRequirements};
@@ -14,6 +13,7 @@ use crate::media_queries::{Device, MediaType};
 use crate::values::computed::CSSPixelLength;
 use crate::values::computed::Resolution;
 use crate::Atom;
+use app_units::Au;
 use euclid::Size2D;
 
 fn viewport_size(device: &Device) -> Size2D<Au> {
diff --git a/servo/components/style/gecko/media_queries.rs b/servo/components/style/gecko/media_queries.rs
index f7ed0fd85b73..851422467ce6 100644
--- a/servo/components/style/gecko/media_queries.rs
+++ b/servo/components/style/gecko/media_queries.rs
@@ -4,8 +4,6 @@
 
 //! Gecko's media-query device and expression representation.
 
-use app_units::Au;
-use app_units::AU_PER_PX;
 use crate::custom_properties::CssEnvironment;
 use crate::gecko::values::{convert_nscolor_to_rgba, convert_rgba_to_nscolor};
 use crate::gecko_bindings::bindings;
@@ -16,6 +14,8 @@ use crate::properties::ComputedValues;
 use crate::string_cache::Atom;
 use crate::values::computed::font::FontSize;
 use crate::values::{CustomIdent, KeyframesName};
+use app_units::Au;
+use app_units::AU_PER_PX;
 use cssparser::RGBA;
 use euclid::Size2D;
 use euclid::TypedScale;
diff --git a/servo/components/style/gecko/selector_parser.rs b/servo/components/style/gecko/selector_parser.rs
index 330bf6057a20..b00cb4f909e3 100644
--- a/servo/components/style/gecko/selector_parser.rs
+++ b/servo/components/style/gecko/selector_parser.rs
@@ -230,33 +230,34 @@ impl NonTSPseudoClass {
     /// Returns true if the given pseudoclass should trigger style sharing cache
     /// revalidation.
     pub fn needs_cache_revalidation(&self) -> bool {
-        self.state_flag().is_empty() && !matches!(*self,
-                  // :-moz-any is handled by the revalidation visitor walking
-                  // the things inside it; it does not need to cause
-                  // revalidation on its own.
-                  NonTSPseudoClass::MozAny(_) |
-                  // :dir() depends on state only, but doesn't use state_flag
-                  // because its semantics don't quite match.  Nevertheless, it
-                  // doesn't need cache revalidation, because we already compare
-                  // states for elements and candidates.
-                  NonTSPseudoClass::Dir(_) |
-                  // :-moz-is-html only depends on the state of the document and
-                  // the namespace of the element; the former is invariant
-                  // across all the elements involved and the latter is already
-                  // checked for by our caching precondtions.
-                  NonTSPseudoClass::MozIsHTML |
-                  // :-moz-placeholder is parsed but never matches.
-                  NonTSPseudoClass::MozPlaceholder |
-                  // :-moz-locale-dir and :-moz-window-inactive depend only on
-                  // the state of the document, which is invariant across all
-                  // the elements involved in a given style cache.
-                  NonTSPseudoClass::MozLocaleDir(_) |
-                  NonTSPseudoClass::MozWindowInactive |
-                  // Similar for the document themes.
-                  NonTSPseudoClass::MozLWTheme |
-                  NonTSPseudoClass::MozLWThemeBrightText |
-                  NonTSPseudoClass::MozLWThemeDarkText
-        )
+        self.state_flag().is_empty() &&
+            !matches!(*self,
+                      // :-moz-any is handled by the revalidation visitor walking
+                      // the things inside it; it does not need to cause
+                      // revalidation on its own.
+                      NonTSPseudoClass::MozAny(_) |
+                      // :dir() depends on state only, but doesn't use state_flag
+                      // because its semantics don't quite match.  Nevertheless, it
+                      // doesn't need cache revalidation, because we already compare
+                      // states for elements and candidates.
+                      NonTSPseudoClass::Dir(_) |
+                      // :-moz-is-html only depends on the state of the document and
+                      // the namespace of the element; the former is invariant
+                      // across all the elements involved and the latter is already
+                      // checked for by our caching precondtions.
+                      NonTSPseudoClass::MozIsHTML |
+                      // :-moz-placeholder is parsed but never matches.
+                      NonTSPseudoClass::MozPlaceholder |
+                      // :-moz-locale-dir and :-moz-window-inactive depend only on
+                      // the state of the document, which is invariant across all
+                      // the elements involved in a given style cache.
+                      NonTSPseudoClass::MozLocaleDir(_) |
+                      NonTSPseudoClass::MozWindowInactive |
+                      // Similar for the document themes.
+                      NonTSPseudoClass::MozLWTheme |
+                      NonTSPseudoClass::MozLWThemeBrightText |
+                      NonTSPseudoClass::MozLWThemeDarkText
+            )
     }
 
     /// Returns true if the evaluation of the pseudo-class depends on the
diff --git a/servo/components/style/gecko/values.rs b/servo/components/style/gecko/values.rs
index a9162264baae..b22f68cd05d0 100644
--- a/servo/components/style/gecko/values.rs
+++ b/servo/components/style/gecko/values.rs
@@ -6,7 +6,6 @@
 
 //! Different kind of helpers to interact with Gecko values.
 
-use app_units::Au;
 use crate::counter_style::{Symbol, Symbols};
 use crate::gecko_bindings::structs::{self, nsStyleCoord, CounterStylePtr};
 use crate::gecko_bindings::structs::{StyleGridTrackBreadth, StyleShapeRadius};
@@ -27,6 +26,7 @@ use crate::values::generics::length::{MaxLength, MozLength};
 use crate::values::generics::{CounterStyleOrNone, NonNegative};
 use crate::values::{Auto, Either, None_, Normal};
 use crate::Atom;
+use app_units::Au;
 use cssparser::RGBA;
 use nsstring::{nsACString, nsCStr};
 use std::cmp::max;
diff --git a/servo/components/style/gecko/wrapper.rs b/servo/components/style/gecko/wrapper.rs
index 5e711cabd5c3..1a9ea0b3ad90 100644
--- a/servo/components/style/gecko/wrapper.rs
+++ b/servo/components/style/gecko/wrapper.rs
@@ -14,8 +14,6 @@
 //! style system it's kind of pointless in the Stylo case, and only Servo forces
 //! the separation between the style system implementation and everything else.
 
-use app_units::Au;
-use atomic_refcell::{AtomicRefCell, AtomicRefMut};
 use crate::applicable_declarations::ApplicableDeclarationBlock;
 use crate::author_styles::AuthorStyles;
 use crate::context::{PostAnimationTasks, QuirksMode, SharedStyleContext, UpdateAnimationsTasks};
@@ -72,6 +70,8 @@ use crate::shared_lock::Locked;
 use crate::string_cache::{Atom, Namespace, WeakAtom, WeakNamespace};
 use crate::stylist::CascadeData;
 use crate::CaseSensitivityExt;
+use app_units::Au;
+use atomic_refcell::{AtomicRefCell, AtomicRefMut};
 use selectors::attr::{AttrSelectorOperation, AttrSelectorOperator};
 use selectors::attr::{CaseSensitivity, NamespaceConstraint};
 use selectors::matching::VisitedHandlingMode;
@@ -931,13 +931,14 @@ impl<'le> GeckoElement<'le> {
 
         debug_assert_eq!(to.is_some(), from.is_some());
 
-        combined_duration > 0.0f32 && from != to && from
-            .unwrap()
-            .animate(
-                to.as_ref().unwrap(),
-                Procedure::Interpolate { progress: 0.5 },
-            )
-            .is_ok()
+        combined_duration > 0.0f32 &&
+            from != to &&
+            from.unwrap()
+                .animate(
+                    to.as_ref().unwrap(),
+                    Procedure::Interpolate { progress: 0.5 },
+                )
+                .is_ok()
     }
 }
 
@@ -1241,10 +1242,11 @@ impl<'le> TElement for GeckoElement<'le> {
     }
 
     fn owner_doc_matches_for_testing(&self, device: &Device) -> bool {
-        self.as_node().owner_doc().0 as *const structs::Document == device
-            .pres_context()
-            .mDocument
-            .mRawPtr
+        self.as_node().owner_doc().0 as *const structs::Document ==
+            device
+                .pres_context()
+                .mDocument
+                .mRawPtr
     }
 
     fn style_attribute(&self) -> Option<ArcBorrow<Locked<PropertyDeclarationBlock>>> {
@@ -1861,9 +1863,8 @@ impl<'le> TElement for GeckoElement<'le> {
                 .intersects(NonTSPseudoClass::Active.state_flag());
             if active {
                 let declarations = unsafe { Gecko_GetActiveLinkAttrDeclarationBlock(self.0) };
-                let declarations: Option<
-                    &RawOffsetArc<Locked<PropertyDeclarationBlock>>,
-                > = declarations.and_then(|s| s.as_arc_opt());
+                let declarations: Option<&RawOffsetArc<Locked<PropertyDeclarationBlock>>> =
+                    declarations.and_then(|s| s.as_arc_opt());
                 if let Some(decl) = declarations {
                     hints.push(ApplicableDeclarationBlock::from_declarations(
                         decl.clone_arc(),
@@ -2078,11 +2079,10 @@ impl<'le> ::selectors::Element for GeckoElement<'le> {
             return false;
         }
 
-        debug_assert!(
-            self.as_node()
-                .parent_node()
-                .map_or(false, |p| p.is_document())
-        );
+        debug_assert!(self
+            .as_node()
+            .parent_node()
+            .map_or(false, |p| p.is_document()));
         unsafe { bindings::Gecko_IsRootElement(self.0) }
     }
 
diff --git a/servo/components/style/gecko_bindings/mod.rs b/servo/components/style/gecko_bindings/mod.rs
index 75e045a4bbdd..78fc8e3ae76d 100644
--- a/servo/components/style/gecko_bindings/mod.rs
+++ b/servo/components/style/gecko_bindings/mod.rs
@@ -4,12 +4,7 @@
 
 //! Gecko's C++ bindings, along with some rust helpers to ease its use.
 
-#[allow(
-    dead_code,
-    improper_ctypes,
-    non_camel_case_types,
-    missing_docs
-)]
+#[allow(dead_code, improper_ctypes, non_camel_case_types, missing_docs)]
 pub mod bindings {
     include!(concat!(env!("OUT_DIR"), "/gecko/bindings.rs"));
 }
diff --git a/servo/components/style/gecko_bindings/sugar/ns_css_shadow_item.rs b/servo/components/style/gecko_bindings/sugar/ns_css_shadow_item.rs
index 4a17093ba077..03d68576deab 100644
--- a/servo/components/style/gecko_bindings/sugar/ns_css_shadow_item.rs
+++ b/servo/components/style/gecko_bindings/sugar/ns_css_shadow_item.rs
@@ -4,9 +4,9 @@
 
 //! Rust helpers for Gecko's `nsCSSShadowItem`.
 
-use app_units::Au;
 use crate::gecko_bindings::structs::nsCSSShadowItem;
 use crate::values::computed::effects::{BoxShadow, SimpleShadow};
+use app_units::Au;
 
 impl nsCSSShadowItem {
     /// Sets this item from the given box shadow.
diff --git a/servo/components/style/invalidation/element/element_wrapper.rs b/servo/components/style/invalidation/element/element_wrapper.rs
index ca18c6d8e76c..c794eb15c2c2 100644
--- a/servo/components/style/invalidation/element/element_wrapper.rs
+++ b/servo/components/style/invalidation/element/element_wrapper.rs
@@ -208,10 +208,10 @@ where
             // Instead, we use the `visited_handling` to determine if they
             // match.
             NonTSPseudoClass::Link => {
-                return self.is_link() && context.visited_handling().matches_unvisited()
+                return self.is_link() && context.visited_handling().matches_unvisited();
             },
             NonTSPseudoClass::Visited => {
-                return self.is_link() && context.visited_handling().matches_visited()
+                return self.is_link() && context.visited_handling().matches_visited();
             },
 
             #[cfg(feature = "gecko")]
diff --git a/servo/components/style/logical_geometry.rs b/servo/components/style/logical_geometry.rs
index 55ba76a60d57..b6cc9ef5bc67 100644
--- a/servo/components/style/logical_geometry.rs
+++ b/servo/components/style/logical_geometry.rs
@@ -1221,11 +1221,12 @@ impl<T: Copy + Add<T, Output = T> + Sub<T, Output = T>> LogicalRect<T> {
 
     pub fn translate(&self, offset: &LogicalPoint<T>) -> LogicalRect<T> {
         LogicalRect {
-            start: self.start + LogicalSize {
-                inline: offset.i,
-                block: offset.b,
-                debug_writing_mode: offset.debug_writing_mode,
-            },
+            start: self.start +
+                LogicalSize {
+                    inline: offset.i,
+                    block: offset.b,
+                    debug_writing_mode: offset.debug_writing_mode,
+                },
             size: self.size,
             debug_writing_mode: self.debug_writing_mode,
         }
diff --git a/servo/components/style/matching.rs b/servo/components/style/matching.rs
index c7c547a3c61e..b1240443dea9 100644
--- a/servo/components/style/matching.rs
+++ b/servo/components/style/matching.rs
@@ -469,11 +469,9 @@ trait PrivateMatchMethods: TElement {
         pseudo: Option<&PseudoElement>,
     ) -> ChildCascadeRequirement {
         debug!("accumulate_damage_for: {:?}", self);
-        debug_assert!(
-            !shared_context
-                .traversal_flags
-                .contains(TraversalFlags::Forgetful)
-        );
+        debug_assert!(!shared_context
+            .traversal_flags
+            .contains(TraversalFlags::Forgetful));
 
         let difference = self.compute_style_difference(old_values, new_values, pseudo);
 
diff --git a/servo/components/style/media_queries/media_feature.rs b/servo/components/style/media_queries/media_feature.rs
index 69808242772c..d5e015b3b072 100644
--- a/servo/components/style/media_queries/media_feature.rs
+++ b/servo/components/style/media_queries/media_feature.rs
@@ -30,9 +30,10 @@ type MediaFeatureEvaluator<T> = fn(
 pub type KeywordSerializer = fn(KeywordDiscriminant) -> String;
 
 /// Parses a given identifier.
-pub type KeywordParser =
-    for<'a, 'i, 't> fn(context: &'a ParserContext, input: &'a mut Parser<'i, 't>)
-        -> Result<KeywordDiscriminant, ParseError<'i>>;
+pub type KeywordParser = for<'a, 'i, 't> fn(
+    context: &'a ParserContext,
+    input: &'a mut Parser<'i, 't>,
+) -> Result<KeywordDiscriminant, ParseError<'i>>;
 
 /// An evaluator for a given media feature.
 ///
diff --git a/servo/components/style/media_queries/media_feature_expression.rs b/servo/components/style/media_queries/media_feature_expression.rs
index 5144189778de..ec864510c725 100644
--- a/servo/components/style/media_queries/media_feature_expression.rs
+++ b/servo/components/style/media_queries/media_feature_expression.rs
@@ -134,10 +134,11 @@ impl RangeOrOperator {
 
         match range_or_op {
             RangeOrOperator::Range(range) => {
-                cmp == Ordering::Equal || match range {
-                    Range::Min => cmp == Ordering::Greater,
-                    Range::Max => cmp == Ordering::Less,
-                }
+                cmp == Ordering::Equal ||
+                    match range {
+                        Range::Min => cmp == Ordering::Greater,
+                        Range::Max => cmp == Ordering::Less,
+                    }
             },
             RangeOrOperator::Operator(op) => match op {
                 Operator::Equal => cmp == Ordering::Equal,
@@ -344,7 +345,7 @@ impl MediaFeatureExpression {
                 Err(()) => {
                     return Err(location.new_custom_error(
                         StyleParseErrorKind::MediaQueryExpectedFeatureName(ident.clone()),
-                    ))
+                    ));
                 },
             }
 
diff --git a/servo/components/style/media_queries/media_list.rs b/servo/components/style/media_queries/media_list.rs
index bd4125d53247..0acf4f1bdf9d 100644
--- a/servo/components/style/media_queries/media_list.rs
+++ b/servo/components/style/media_queries/media_list.rs
@@ -74,21 +74,22 @@ impl MediaList {
     pub fn evaluate(&self, device: &Device, quirks_mode: QuirksMode) -> bool {
         // Check if it is an empty media query list or any queries match.
         // https://drafts.csswg.org/mediaqueries-4/#mq-list
-        self.media_queries.is_empty() || self.media_queries.iter().any(|mq| {
-            let media_match = mq.media_type.matches(device.media_type());
+        self.media_queries.is_empty() ||
+            self.media_queries.iter().any(|mq| {
+                let media_match = mq.media_type.matches(device.media_type());
 
-            // Check if the media condition match.
-            let query_match = media_match && mq
-                .condition
-                .as_ref()
-                .map_or(true, |c| c.matches(device, quirks_mode));
+                // Check if the media condition match.
+                let query_match = media_match &&
+                    mq.condition
+                        .as_ref()
+                        .map_or(true, |c| c.matches(device, quirks_mode));
 
-            // Apply the logical NOT qualifier to the result
-            match mq.qualifier {
-                Some(Qualifier::Not) => !query_match,
-                _ => query_match,
-            }
-        })
+                // Apply the logical NOT qualifier to the result
+                match mq.qualifier {
+                    Some(Qualifier::Not) => !query_match,
+                    _ => query_match,
+                }
+            })
     }
 
     /// Whether this `MediaList` contains no media queries.
diff --git a/servo/components/style/parallel.rs b/servo/components/style/parallel.rs
index 1b9f80f5722c..237453084df7 100644
--- a/servo/components/style/parallel.rs
+++ b/servo/components/style/parallel.rs
@@ -22,11 +22,11 @@
 
 #![deny(missing_docs)]
 
-use arrayvec::ArrayVec;
 use crate::context::{StyleContext, ThreadLocalStyleContext};
 use crate::dom::{OpaqueNode, SendNode, TElement};
 use crate::scoped_tls::ScopedTLS;
 use crate::traversal::{DomTraversal, PerLevelTraversalData};
+use arrayvec::ArrayVec;
 use itertools::Itertools;
 use rayon;
 use smallvec::SmallVec;
diff --git a/servo/components/style/servo/media_queries.rs b/servo/components/style/servo/media_queries.rs
index d35e8dc3ccd0..b3c99cf875a9 100644
--- a/servo/components/style/servo/media_queries.rs
+++ b/servo/components/style/servo/media_queries.rs
@@ -4,7 +4,6 @@
 
 //! Servo's media-query device and expression representation.
 
-use app_units::Au;
 use crate::custom_properties::CssEnvironment;
 use crate::media_queries::media_feature::{AllowsRanges, ParsingRequirements};
 use crate::media_queries::media_feature::{Evaluator, MediaFeatureDescription};
@@ -14,6 +13,7 @@ use crate::properties::ComputedValues;
 use crate::values::computed::font::FontSize;
 use crate::values::computed::CSSPixelLength;
 use crate::values::KeyframesName;
+use app_units::Au;
 use cssparser::RGBA;
 use euclid::{Size2D, TypedScale, TypedSize2D};
 use std::sync::atomic::{AtomicBool, AtomicIsize, Ordering};
diff --git a/servo/components/style/servo/selector_parser.rs b/servo/components/style/servo/selector_parser.rs
index cd7252280177..9abfe9769197 100644
--- a/servo/components/style/servo/selector_parser.rs
+++ b/servo/components/style/servo/selector_parser.rs
@@ -457,7 +457,7 @@ impl<'a, 'i> ::selectors::Parser<'i> for SelectorParser<'a> {
         parser: &mut CssParser<'i, 't>,
     ) -> Result<NonTSPseudoClass, ParseError<'i>> {
         use self::NonTSPseudoClass::*;
-        let pseudo_class = match_ignore_ascii_case!{ &name,
+        let pseudo_class = match_ignore_ascii_case! { &name,
             "lang" => {
                 Lang(parser.expect_ident_or_string()?.as_ref().into())
             }
diff --git a/servo/components/style/shared_lock.rs b/servo/components/style/shared_lock.rs
index 57038f627fe3..09bfa1635034 100644
--- a/servo/components/style/shared_lock.rs
+++ b/servo/components/style/shared_lock.rs
@@ -4,10 +4,10 @@
 
 //! Different objects protected by the same lock
 
-#[cfg(feature = "gecko")]
-use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 use crate::str::{CssString, CssStringWriter};
 use crate::stylesheets::Origin;
+#[cfg(feature = "gecko")]
+use atomic_refcell::{AtomicRef, AtomicRefCell, AtomicRefMut};
 #[cfg(feature = "servo")]
 use parking_lot::RwLock;
 use servo_arc::Arc;
diff --git a/servo/components/style/sharing/mod.rs b/servo/components/style/sharing/mod.rs
index 843fd76e2e66..c7be23572c67 100644
--- a/servo/components/style/sharing/mod.rs
+++ b/servo/components/style/sharing/mod.rs
@@ -64,7 +64,6 @@
 //! selectors are effectively stripped off, so that matching them all against
 //! elements makes sense.
 
-use atomic_refcell::{AtomicRefCell, AtomicRefMut};
 use crate::applicable_declarations::ApplicableDeclarationBlock;
 use crate::bloom::StyleBloom;
 use crate::context::{SelectorFlagsMap, SharedStyleContext, StyleContext};
@@ -75,6 +74,7 @@ use crate::rule_tree::StrongRuleNode;
 use crate::style_resolver::{PrimaryStyle, ResolvedElementStyles};
 use crate::stylist::Stylist;
 use crate::Atom;
+use atomic_refcell::{AtomicRefCell, AtomicRefMut};
 use owning_ref::OwningHandle;
 use selectors::matching::{ElementSelectorFlags, VisitedHandlingMode};
 use selectors::NthIndexCache;
diff --git a/servo/components/style/style_adjuster.rs b/servo/components/style/style_adjuster.rs
index ea4e6a43d74a..248d0ad0661b 100644
--- a/servo/components/style/style_adjuster.rs
+++ b/servo/components/style/style_adjuster.rs
@@ -5,7 +5,6 @@
 //! A struct to encapsulate all the style fixups and flags propagations
 //! a computed style needs in order for it to adhere to the CSS spec.
 
-use app_units::Au;
 use crate::dom::TElement;
 use crate::properties::computed_value_flags::ComputedValueFlags;
 use crate::properties::longhands::display::computed_value::T as Display;
@@ -13,6 +12,7 @@ use crate::properties::longhands::float::computed_value::T as Float;
 use crate::properties::longhands::overflow_x::computed_value::T as Overflow;
 use crate::properties::longhands::position::computed_value::T as Position;
 use crate::properties::{self, ComputedValues, StyleBuilder};
+use app_units::Au;
 
 /// A struct that implements all the adjustment methods.
 ///
@@ -190,12 +190,10 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
         let is_root = self.style.pseudo.is_none() && element.map_or(false, |e| e.is_root());
         blockify_if!(is_root);
         if !self.skip_item_display_fixup(element) {
-            blockify_if!(
-                layout_parent_style
-                    .get_box()
-                    .clone_display()
-                    .is_item_container()
-            );
+            blockify_if!(layout_parent_style
+                .get_box()
+                .clone_display()
+                .is_item_container());
         }
 
         let is_item_or_root = blockify;
@@ -220,11 +218,12 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
     pub fn set_bits(&mut self) {
         let display = self.style.get_box().clone_display();
 
-        if !display.is_contents() && !self
-            .style
-            .get_text()
-            .clone_text_decoration_line()
-            .is_empty()
+        if !display.is_contents() &&
+            !self
+                .style
+                .get_text()
+                .clone_text_decoration_line()
+                .is_empty()
         {
             self.style
                 .flags
@@ -299,10 +298,10 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
     #[cfg(feature = "gecko")]
     fn adjust_for_text_in_ruby(&mut self) {
         let parent_display = self.style.get_parent_box().clone_display();
-        if parent_display.is_ruby_type() || self
-            .style
-            .get_parent_flags()
-            .contains(ComputedValueFlags::SHOULD_SUPPRESS_LINEBREAK)
+        if parent_display.is_ruby_type() ||
+            self.style
+                .get_parent_flags()
+                .contains(ComputedValueFlags::SHOULD_SUPPRESS_LINEBREAK)
         {
             self.style
                 .flags
diff --git a/servo/components/style/stylesheets/font_feature_values_rule.rs b/servo/components/style/stylesheets/font_feature_values_rule.rs
index d7e7315d7be4..a93ed43d4758 100644
--- a/servo/components/style/stylesheets/font_feature_values_rule.rs
+++ b/servo/components/style/stylesheets/font_feature_values_rule.rs
@@ -70,11 +70,7 @@ impl Parse for SingleValue {
         match *input.next()? {
             Token::Number {
                 int_value: Some(v), ..
-            }
-                if v >= 0 =>
-            {
-                Ok(SingleValue(v as u32))
-            },
+            } if v >= 0 => Ok(SingleValue(v as u32)),
             ref t => Err(location.new_unexpected_token_error(t.clone())),
         }
     }
@@ -103,22 +99,14 @@ impl Parse for PairValues {
         let first = match *input.next()? {
             Token::Number {
                 int_value: Some(a), ..
-            }
-                if a >= 0 =>
-            {
-                a as u32
-            },
+            } if a >= 0 => a as u32,
             ref t => return Err(location.new_unexpected_token_error(t.clone())),
         };
         let location = input.current_source_location();
         match input.next() {
             Ok(&Token::Number {
                 int_value: Some(b), ..
-            })
-                if b >= 0 =>
-            {
-                Ok(PairValues(first, Some(b as u32)))
-            },
+            }) if b >= 0 => Ok(PairValues(first, Some(b as u32))),
             // It can't be anything other than number.
             Ok(t) => Err(location.new_unexpected_token_error(t.clone())),
             // It can be just one value.
@@ -157,11 +145,9 @@ impl Parse for VectorValues {
             match input.next() {
                 Ok(&Token::Number {
                     int_value: Some(a), ..
-                })
-                    if a >= 0 =>
-                {
+                }) if a >= 0 => {
                     vec.push(a as u32);
-                }
+                },
                 // It can't be anything other than number.
                 Ok(t) => return Err(location.new_unexpected_token_error(t.clone())),
                 Err(_) => break,
diff --git a/servo/components/style/stylesheets/keyframes_rule.rs b/servo/components/style/stylesheets/keyframes_rule.rs
index 59f015bf4ae6..662bc9ae4814 100644
--- a/servo/components/style/stylesheets/keyframes_rule.rs
+++ b/servo/components/style/stylesheets/keyframes_rule.rs
@@ -141,11 +141,7 @@ impl KeyframePercentage {
             Token::Percentage {
                 unit_value: percentage,
                 ..
-            }
-                if percentage >= 0. && percentage <= 1. =>
-            {
-                Ok(KeyframePercentage::new(percentage))
-            },
+            } if percentage >= 0. && percentage <= 1. => Ok(KeyframePercentage::new(percentage)),
             _ => Err(input.new_unexpected_token_error(token)),
         }
     }
@@ -600,7 +596,7 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for KeyframeDeclarationParser<'a, 'b> {
         let id = match PropertyId::parse(&name, self.context) {
             Ok(id) => id,
             Err(()) => {
-                return Err(input.new_custom_error(StyleParseErrorKind::UnknownProperty(name)))
+                return Err(input.new_custom_error(StyleParseErrorKind::UnknownProperty(name)));
             },
         };
 
diff --git a/servo/components/style/stylesheets/rule_parser.rs b/servo/components/style/stylesheets/rule_parser.rs
index a2a062ba1739..44943259b38d 100644
--- a/servo/components/style/stylesheets/rule_parser.rs
+++ b/servo/components/style/stylesheets/rule_parser.rs
@@ -107,9 +107,10 @@ impl<'b> TopLevelRuleParser<'b> {
         // If there's anything that isn't a namespace rule (or import rule, but
         // we checked that already at the beginning), reject with a
         // StateError.
-        if new_state == State::Namespaces && ctx.rule_list[ctx.index..]
-            .iter()
-            .any(|r| !matches!(*r, CssRule::Namespace(..)))
+        if new_state == State::Namespaces &&
+            ctx.rule_list[ctx.index..]
+                .iter()
+                .any(|r| !matches!(*r, CssRule::Namespace(..)))
         {
             self.dom_error = Some(RulesMutateError::InvalidState);
             return false;
diff --git a/servo/components/style/stylesheets/supports_rule.rs b/servo/components/style/stylesheets/supports_rule.rs
index e0d23ea0f5d5..45f6f97812dc 100644
--- a/servo/components/style/stylesheets/supports_rule.rs
+++ b/servo/components/style/stylesheets/supports_rule.rs
@@ -145,7 +145,7 @@ impl SupportsCondition {
         function: &str,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        match_ignore_ascii_case!{ function,
+        match_ignore_ascii_case! { function,
             // Although this is an internal syntax, it is not necessary
             // to check parsing context as far as we accept any
             // unexpected token as future syntax, and evaluate it to
@@ -350,9 +350,8 @@ impl RawSelector {
                     use crate::selector_parser::PseudoElement;
                     use selectors::parser::Component;
 
-                    let has_any_unknown_webkit_pseudo = selector.has_pseudo_element() && selector
-                        .iter_raw_match_order()
-                        .any(|component| {
+                    let has_any_unknown_webkit_pseudo = selector.has_pseudo_element() &&
+                        selector.iter_raw_match_order().any(|component| {
                             matches!(
                                 *component,
                                 Component::PseudoElement(PseudoElement::UnknownWebkit(..))
diff --git a/servo/components/style/stylesheets/viewport_rule.rs b/servo/components/style/stylesheets/viewport_rule.rs
index d7b644114c64..4df576a15ab8 100644
--- a/servo/components/style/stylesheets/viewport_rule.rs
+++ b/servo/components/style/stylesheets/viewport_rule.rs
@@ -7,7 +7,6 @@
 //! [at]: https://drafts.csswg.org/css-device-adapt/#atviewport-rule
 //! [meta]: https://drafts.csswg.org/css-device-adapt/#viewport-meta
 
-use app_units::Au;
 use crate::context::QuirksMode;
 use crate::error_reporting::ContextualParseError;
 use crate::font_metrics::get_metrics_provider_for_product;
@@ -20,6 +19,7 @@ use crate::str::CssStringWriter;
 use crate::stylesheets::{Origin, StylesheetInDocument};
 use crate::values::computed::{Context, ToComputedValue};
 use crate::values::specified::{LengthOrPercentageOrAuto, NoCalcLength, ViewportPercentageLength};
+use app_units::Au;
 use cssparser::CowRcStr;
 use cssparser::{parse_important, AtRuleParser, DeclarationListParser, DeclarationParser, Parser};
 use euclid::TypedSize2D;
diff --git a/servo/components/style/stylist.rs b/servo/components/style/stylist.rs
index 1d021e6e3e07..3815a8a3da6a 100644
--- a/servo/components/style/stylist.rs
+++ b/servo/components/style/stylist.rs
@@ -355,10 +355,7 @@ pub struct Stylist {
     stylesheets: StylistStylesheetSet,
 
     /// If true, the quirks-mode stylesheet is applied.
-    #[cfg_attr(
-        feature = "servo",
-        ignore_malloc_size_of = "defined in selectors"
-    )]
+    #[cfg_attr(feature = "servo", ignore_malloc_size_of = "defined in selectors")]
     quirks_mode: QuirksMode,
 
     /// Selector maps for all of the style sheets in the stylist, after
@@ -1572,9 +1569,8 @@ impl<'a> SelectorVisitor for StylistSelectorVisitor<'a> {
         // Also, note that this call happens before we visit any of the simple
         // selectors in the next ComplexSelector, so we can use this to skip
         // looking at them.
-        self.passed_rightmost_selector =
-            self.passed_rightmost_selector ||
-                !matches!(combinator, None | Some(Combinator::PseudoElement));
+        self.passed_rightmost_selector = self.passed_rightmost_selector ||
+            !matches!(combinator, None | Some(Combinator::PseudoElement));
 
         true
     }
@@ -1591,9 +1587,8 @@ impl<'a> SelectorVisitor for StylistSelectorVisitor<'a> {
     }
 
     fn visit_simple_selector(&mut self, s: &Component<SelectorImpl>) -> bool {
-        self.needs_revalidation =
-            self.needs_revalidation ||
-                component_needs_revalidation(s, self.passed_rightmost_selector);
+        self.needs_revalidation = self.needs_revalidation ||
+            component_needs_revalidation(s, self.passed_rightmost_selector);
 
         match *s {
             Component::NonTSPseudoClass(ref p) => {
@@ -2026,10 +2021,10 @@ impl CascadeData {
                     debug!("Found valid keyframes rule: {:?}", *keyframes_rule);
 
                     // Don't let a prefixed keyframes animation override a non-prefixed one.
-                    let needs_insertion = keyframes_rule.vendor_prefix.is_none() || self
-                        .animations
-                        .get(keyframes_rule.name.as_atom())
-                        .map_or(true, |rule| rule.vendor_prefix.is_some());
+                    let needs_insertion = keyframes_rule.vendor_prefix.is_none() ||
+                        self.animations
+                            .get(keyframes_rule.name.as_atom())
+                            .map_or(true, |rule| rule.vendor_prefix.is_some());
                     if needs_insertion {
                         let animation = KeyframesAnimation::from_keyframes(
                             &keyframes_rule.keyframes,
diff --git a/servo/components/style/traversal.rs b/servo/components/style/traversal.rs
index 89cbfb834771..f1821900bb4b 100644
--- a/servo/components/style/traversal.rs
+++ b/servo/components/style/traversal.rs
@@ -208,11 +208,11 @@ pub trait DomTraversal<E: TElement>: Sync {
         // animation-only restyle hint or recascade.
         if traversal_flags.for_animation_only() {
             return data.map_or(false, |d| d.has_styles()) &&
-                (el.has_animation_only_dirty_descendants() || data
-                    .as_ref()
-                    .unwrap()
-                    .hint
-                    .has_animation_hint_or_recascade());
+                (el.has_animation_only_dirty_descendants() ||
+                    data.as_ref()
+                        .unwrap()
+                        .hint
+                        .has_animation_hint_or_recascade());
         }
 
         // Non-incremental layout visits every node.
@@ -516,9 +516,8 @@ pub fn recalc_style_at<E, D, F>(
         !child_cascade_requirement.can_skip_cascade() ||
         is_servo_nonincremental_layout();
 
-    traverse_children =
-        traverse_children &&
-            !traversal.should_cull_subtree(context, element, &data, is_initial_style);
+    traverse_children = traverse_children &&
+        !traversal.should_cull_subtree(context, element, &data, is_initial_style);
 
     // Examine our children, and enqueue the appropriate ones for traversal.
     if traverse_children {
diff --git a/servo/components/style/values/animated/mod.rs b/servo/components/style/values/animated/mod.rs
index 1c96d13accac..bd0a7af1f95b 100644
--- a/servo/components/style/values/animated/mod.rs
+++ b/servo/components/style/values/animated/mod.rs
@@ -8,7 +8,6 @@
 //! computed values and need yet another intermediate representation. This
 //! module's raison d'être is to ultimately contain all these types.
 
-use app_units::Au;
 use crate::properties::PropertyId;
 use crate::values::computed::length::CalcLengthOrPercentage;
 use crate::values::computed::url::ComputedUrl;
@@ -16,6 +15,7 @@ use crate::values::computed::Angle as ComputedAngle;
 use crate::values::computed::Image;
 use crate::values::CSSFloat;
 use crate::values::specified::SVGPathData;
+use app_units::Au;
 use euclid::{Point2D, Size2D};
 use smallvec::SmallVec;
 use std::cmp;
diff --git a/servo/components/style/values/computed/border.rs b/servo/components/style/values/computed/border.rs
index e9cb3f3fa83f..09dcfbe117ad 100644
--- a/servo/components/style/values/computed/border.rs
+++ b/servo/components/style/values/computed/border.rs
@@ -4,7 +4,6 @@
 
 //! Computed types for CSS values related to borders.
 
-use app_units::Au;
 use crate::values::generics::NonNegative;
 use crate::values::computed::length::{NonNegativeLengthOrPercentage, NonNegativeLength};
 use crate::values::computed::{NonNegativeNumber, NonNegativeNumberOrPercentage};
@@ -15,6 +14,7 @@ use crate::values::generics::border::BorderRadius as GenericBorderRadius;
 use crate::values::generics::border::BorderSpacing as GenericBorderSpacing;
 use crate::values::generics::rect::Rect;
 use crate::values::generics::size::Size;
+use app_units::Au;
 
 pub use crate::values::specified::border::BorderImageRepeat;
 
diff --git a/servo/components/style/values/computed/font.rs b/servo/components/style/values/computed/font.rs
index b818bf998c14..765efd9a0d87 100644
--- a/servo/components/style/values/computed/font.rs
+++ b/servo/components/style/values/computed/font.rs
@@ -4,8 +4,6 @@
 
 //! Computed values for font properties
 
-use app_units::Au;
-use byteorder::{BigEndian, ByteOrder};
 #[cfg(feature = "gecko")]
 use crate::gecko_bindings::sugar::refptr::RefPtr;
 #[cfg(feature = "gecko")]
@@ -19,6 +17,8 @@ use crate::values::specified::font::{self as specified, MAX_FONT_WEIGHT, MIN_FON
 use crate::values::specified::length::{FontBaseSize, NoCalcLength};
 use crate::values::CSSFloat;
 use crate::Atom;
+use app_units::Au;
+use byteorder::{BigEndian, ByteOrder};
 use cssparser::{serialize_identifier, CssStringWriter, Parser};
 #[cfg(feature = "gecko")]
 use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
diff --git a/servo/components/style/values/computed/length.rs b/servo/components/style/values/computed/length.rs
index 1af28587a391..240b5ceb1ee9 100644
--- a/servo/components/style/values/computed/length.rs
+++ b/servo/components/style/values/computed/length.rs
@@ -5,7 +5,6 @@
 //! `<length>` computed values, and related ones.
 
 use super::{Context, Number, Percentage, ToComputedValue};
-use app_units::Au;
 use crate::values::animated::{Animate, Procedure, ToAnimatedValue, ToAnimatedZero};
 use crate::values::distance::{ComputeSquaredDistance, SquaredDistance};
 use crate::values::generics::length::MaxLength as GenericMaxLength;
@@ -15,6 +14,7 @@ use crate::values::generics::NonNegative;
 use crate::values::specified::length::ViewportPercentageLength;
 use crate::values::specified::length::{AbsoluteLength, FontBaseSize, FontRelativeLength};
 use crate::values::{specified, Auto, CSSFloat, Either, IsAuto, Normal};
+use app_units::Au;
 use ordered_float::NotNan;
 use std::fmt::{self, Write};
 use std::ops::{Add, Neg};
diff --git a/servo/components/style/values/generics/basic_shape.rs b/servo/components/style/values/generics/basic_shape.rs
index 6ffb0da69c3f..bfe709ceb4b7 100644
--- a/servo/components/style/values/generics/basic_shape.rs
+++ b/servo/components/style/values/generics/basic_shape.rs
@@ -291,11 +291,7 @@ where
             (
                 &ShapeSource::Shape(ref this, ref this_box),
                 &ShapeSource::Shape(ref other, ref other_box),
-            )
-                if this_box == other_box =>
-            {
-                this.compute_squared_distance(other)
-            },
+            ) if this_box == other_box => this.compute_squared_distance(other),
             (&ShapeSource::Path(ref this), &ShapeSource::Path(ref other))
                 if this.fill == other.fill =>
             {
diff --git a/servo/components/style/values/generics/font.rs b/servo/components/style/values/generics/font.rs
index 0d5e6b21eee4..ee14e15bfe5e 100644
--- a/servo/components/style/values/generics/font.rs
+++ b/servo/components/style/values/generics/font.rs
@@ -4,9 +4,9 @@
 
 //! Generic types for font stuff.
 
+use crate::parser::{Parse, ParserContext};
 use app_units::Au;
 use byteorder::{BigEndian, ReadBytesExt};
-use crate::parser::{Parse, ParserContext};
 use cssparser::Parser;
 use num_traits::One;
 use std::fmt::{self, Write};
diff --git a/servo/components/style/values/generics/text.rs b/servo/components/style/values/generics/text.rs
index df0279c71212..090c3c1f687b 100644
--- a/servo/components/style/values/generics/text.rs
+++ b/servo/components/style/values/generics/text.rs
@@ -4,10 +4,10 @@
 
 //! Generic types for text properties.
 
-use app_units::Au;
 use crate::parser::ParserContext;
 use crate::values::animated::{Animate, Procedure, ToAnimatedZero};
 use crate::values::distance::{ComputeSquaredDistance, SquaredDistance};
+use app_units::Au;
 use cssparser::Parser;
 use style_traits::ParseError;
 
diff --git a/servo/components/style/values/generics/transform.rs b/servo/components/style/values/generics/transform.rs
index 91af1355a272..158b7456c762 100644
--- a/servo/components/style/values/generics/transform.rs
+++ b/servo/components/style/values/generics/transform.rs
@@ -4,13 +4,13 @@
 
 //! Generic types for CSS values that are related to transformations.
 
-use app_units::Au;
 use crate::values::computed::length::Length as ComputedLength;
 use crate::values::computed::length::LengthOrPercentage as ComputedLengthOrPercentage;
 use crate::values::specified::angle::Angle as SpecifiedAngle;
 use crate::values::specified::length::Length as SpecifiedLength;
 use crate::values::specified::length::LengthOrPercentage as SpecifiedLengthOrPercentage;
 use crate::values::{computed, CSSFloat};
+use app_units::Au;
 use euclid::{self, Rect, Transform3D};
 use num_traits::Zero;
 use std::fmt::{self, Write};
diff --git a/servo/components/style/values/mod.rs b/servo/components/style/values/mod.rs
index 8a47220fd6ad..659ff95b1a7b 100644
--- a/servo/components/style/values/mod.rs
+++ b/servo/components/style/values/mod.rs
@@ -93,10 +93,7 @@ where
 }
 
 /// Convenience void type to disable some properties and values through types.
-#[cfg_attr(
-    feature = "servo",
-    derive(Deserialize, MallocSizeOf, Serialize)
-)]
+#[cfg_attr(feature = "servo", derive(Deserialize, MallocSizeOf, Serialize))]
 #[derive(
     Clone, Copy, Debug, PartialEq, SpecifiedValueInfo, ToAnimatedValue, ToComputedValue, ToCss,
 )]
diff --git a/servo/components/style/values/specified/angle.rs b/servo/components/style/values/specified/angle.rs
index 6e8cd059f35c..35a0944aed56 100644
--- a/servo/components/style/values/specified/angle.rs
+++ b/servo/components/style/values/specified/angle.rs
@@ -193,7 +193,7 @@ impl Angle {
                 AllowUnitlessZeroAngle::No => Err(()),
             },
             Token::Function(ref name) if name.eq_ignore_ascii_case("calc") => {
-                return input.parse_nested_block(|i| CalcNode::parse_angle(context, i))
+                return input.parse_nested_block(|i| CalcNode::parse_angle(context, i));
             },
             _ => Err(()),
         }
diff --git a/servo/components/style/values/specified/box.rs b/servo/components/style/values/specified/box.rs
index 54030ba71395..c785fb0c0dbb 100644
--- a/servo/components/style/values/specified/box.rs
+++ b/servo/components/style/values/specified/box.rs
@@ -218,10 +218,7 @@ impl Display {
             // Special handling for contents and list-item on the root
             // element for Gecko.
             #[cfg(feature = "gecko")]
-            Display::Contents | Display::ListItem if _is_root_element =>
-            {
-                Display::Block
-            },
+            Display::Contents | Display::ListItem if _is_root_element => Display::Block,
 
             // These are not changed by blockification.
             Display::None | Display::Block | Display::Flex | Display::ListItem | Display::Table => {
@@ -747,7 +744,9 @@ impl Parse for Contain {
             let flag = match flag {
                 Some(flag) if !result.contains(flag) => flag,
                 _ => {
-                    return Err(input.new_custom_error(SelectorParseErrorKind::UnexpectedIdent(name)))
+                    return Err(
+                        input.new_custom_error(SelectorParseErrorKind::UnexpectedIdent(name))
+                    );
                 },
             };
             result.insert(flag);
@@ -826,7 +825,7 @@ impl Parse for TransitionProperty {
                     location,
                     ident,
                     &["none"],
-                )?))
+                )?));
             },
         };
 
@@ -1309,7 +1308,7 @@ impl BreakBetween {
             Ok(v) => v,
             Err(()) => {
                 return Err(location
-                    .new_custom_error(SelectorParseErrorKind::UnexpectedIdent(ident.clone())))
+                    .new_custom_error(SelectorParseErrorKind::UnexpectedIdent(ident.clone())));
             },
         };
         match break_value {
diff --git a/servo/components/style/values/specified/calc.rs b/servo/components/style/values/specified/calc.rs
index 6abb94b946c7..2fe00ff8799a 100644
--- a/servo/components/style/values/specified/calc.rs
+++ b/servo/components/style/values/specified/calc.rs
@@ -180,7 +180,7 @@ impl CalcNode {
             ) => {
                 return NoCalcLength::parse_dimension(context, value, unit)
                     .map(CalcNode::Length)
-                    .map_err(|()| location.new_custom_error(StyleParseErrorKind::UnspecifiedError))
+                    .map_err(|()| location.new_custom_error(StyleParseErrorKind::UnspecifiedError));
             },
             (
                 &Token::Dimension {
@@ -204,7 +204,7 @@ impl CalcNode {
             },
             (&Token::Percentage { unit_value, .. }, CalcUnit::LengthOrPercentage) |
             (&Token::Percentage { unit_value, .. }, CalcUnit::Percentage) => {
-                return Ok(CalcNode::Percentage(unit_value))
+                return Ok(CalcNode::Percentage(unit_value));
             },
             (&Token::ParenthesisBlock, _) => {},
             (&Token::Function(ref name), _) if name.eq_ignore_ascii_case("calc") => {},
diff --git a/servo/components/style/values/specified/counters.rs b/servo/components/style/values/specified/counters.rs
index b89d7ebafe0d..6ee6575fc94d 100644
--- a/servo/components/style/values/specified/counters.rs
+++ b/servo/components/style/values/specified/counters.rs
@@ -181,7 +181,7 @@ impl Parse for Content {
                         None => {
                             return Err(input.new_custom_error(
                                 StyleParseErrorKind::UnexpectedFunction(name.clone()),
-                            ))
+                            ));
                         },
                     }
                 },
diff --git a/servo/components/style/values/specified/font.rs b/servo/components/style/values/specified/font.rs
index 9cf97e2879c1..e5699742b140 100644
--- a/servo/components/style/values/specified/font.rs
+++ b/servo/components/style/values/specified/font.rs
@@ -4,8 +4,6 @@
 
 //! Specified values for font properties
 
-use app_units::Au;
-use byteorder::{BigEndian, ByteOrder};
 #[cfg(feature = "gecko")]
 use crate::gecko_bindings::bindings;
 use crate::parser::{Parse, ParserContext};
@@ -22,6 +20,8 @@ use crate::values::specified::{AllowQuirks, Angle, Integer, LengthOrPercentage};
 use crate::values::specified::{NoCalcLength, Number, Percentage};
 use crate::values::CustomIdent;
 use crate::Atom;
+use app_units::Au;
+use byteorder::{BigEndian, ByteOrder};
 use cssparser::{Parser, Token};
 #[cfg(feature = "gecko")]
 use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
diff --git a/servo/components/style/values/specified/grid.rs b/servo/components/style/values/specified/grid.rs
index cd879e26e48f..8fdaf51b2755 100644
--- a/servo/components/style/values/specified/grid.rs
+++ b/servo/components/style/values/specified/grid.rs
@@ -22,11 +22,7 @@ pub fn parse_flex<'i, 't>(input: &mut Parser<'i, 't>) -> Result<CSSFloat, ParseE
     match *input.next()? {
         Token::Dimension {
             value, ref unit, ..
-        }
-            if unit.eq_ignore_ascii_case("fr") && value.is_sign_positive() =>
-        {
-            Ok(value)
-        },
+        } if unit.eq_ignore_ascii_case("fr") && value.is_sign_positive() => Ok(value),
         ref t => Err(location.new_unexpected_token_error(t.clone())),
     }
 }
diff --git a/servo/components/style/values/specified/image.rs b/servo/components/style/values/specified/image.rs
index 53d028e5711b..d4ace9789a28 100644
--- a/servo/components/style/values/specified/image.rs
+++ b/servo/components/style/values/specified/image.rs
@@ -262,7 +262,7 @@ impl Parse for Gradient {
         let (shape, repeating, mut compat_mode) = match result {
             Some(result) => result,
             None => {
-                return Err(input.new_custom_error(StyleParseErrorKind::UnexpectedFunction(func)))
+                return Err(input.new_custom_error(StyleParseErrorKind::UnexpectedFunction(func)));
             },
         };
 
@@ -792,7 +792,7 @@ impl LineDirection {
                 CompatMode::WebKit if to_ident.is_ok() => {
                     return Err(
                         i.new_custom_error(SelectorParseErrorKind::UnexpectedIdent("to".into()))
-                    )
+                    );
                 },
                 _ => {},
             }
diff --git a/servo/components/style/values/specified/length.rs b/servo/components/style/values/specified/length.rs
index c447a1cfa3e5..dce643a754f2 100644
--- a/servo/components/style/values/specified/length.rs
+++ b/servo/components/style/values/specified/length.rs
@@ -7,7 +7,6 @@
 //! [length]: https://drafts.csswg.org/css-values/#lengths
 
 use super::{AllowQuirks, Number, Percentage, ToComputedValue};
-use app_units::Au;
 use crate::font_metrics::FontMetricsQueryResult;
 use crate::parser::{Parse, ParserContext};
 use crate::values::computed::{self, CSSPixelLength, Context, ExtremumLength};
@@ -17,6 +16,7 @@ use crate::values::generics::transform::IsZeroLength;
 use crate::values::generics::NonNegative;
 use crate::values::specified::calc::CalcNode;
 use crate::values::{Auto, CSSFloat, Either, IsAuto, Normal};
+use app_units::Au;
 use cssparser::{Parser, Token};
 use euclid::Size2D;
 use std::cmp;
@@ -601,12 +601,10 @@ impl Length {
             match *token {
                 Token::Dimension {
                     value, ref unit, ..
-                }
-                    if num_context.is_ok(context.parsing_mode, value) =>
-                {
+                } if num_context.is_ok(context.parsing_mode, value) => {
                     return NoCalcLength::parse_dimension(context, value, unit)
                         .map(Length::NoCalc)
-                        .map_err(|()| location.new_unexpected_token_error(token.clone()))
+                        .map_err(|()| location.new_unexpected_token_error(token.clone()));
                 },
                 Token::Number { value, .. } if num_context.is_ok(context.parsing_mode, value) => {
                     if value != 0. &&
@@ -800,20 +798,18 @@ impl LengthOrPercentage {
             match *token {
                 Token::Dimension {
                     value, ref unit, ..
-                }
-                    if num_context.is_ok(context.parsing_mode, value) =>
-                {
+                } if num_context.is_ok(context.parsing_mode, value) => {
                     return NoCalcLength::parse_dimension(context, value, unit)
                         .map(LengthOrPercentage::Length)
-                        .map_err(|()| location.new_unexpected_token_error(token.clone()))
+                        .map_err(|()| location.new_unexpected_token_error(token.clone()));
                 },
                 Token::Percentage { unit_value, .. }
                     if num_context.is_ok(context.parsing_mode, unit_value) =>
                 {
                     return Ok(LengthOrPercentage::Percentage(computed::Percentage(
                         unit_value,
-                    )))
-                },
+                    )));
+                }
                 Token::Number { value, .. } if num_context.is_ok(context.parsing_mode, value) => {
                     if value != 0. &&
                         !context.parsing_mode.allows_unitless_lengths() &&
@@ -932,20 +928,18 @@ impl LengthOrPercentageOrAuto {
             match *token {
                 Token::Dimension {
                     value, ref unit, ..
-                }
-                    if num_context.is_ok(context.parsing_mode, value) =>
-                {
+                } if num_context.is_ok(context.parsing_mode, value) => {
                     return NoCalcLength::parse_dimension(context, value, unit)
                         .map(LengthOrPercentageOrAuto::Length)
-                        .map_err(|()| location.new_unexpected_token_error(token.clone()))
+                        .map_err(|()| location.new_unexpected_token_error(token.clone()));
                 },
                 Token::Percentage { unit_value, .. }
                     if num_context.is_ok(context.parsing_mode, unit_value) =>
                 {
                     return Ok(LengthOrPercentageOrAuto::Percentage(computed::Percentage(
                         unit_value,
-                    )))
-                },
+                    )));
+                }
                 Token::Number { value, .. } if num_context.is_ok(context.parsing_mode, value) => {
                     if value != 0. &&
                         !context.parsing_mode.allows_unitless_lengths() &&
@@ -958,7 +952,7 @@ impl LengthOrPercentageOrAuto {
                     )));
                 },
                 Token::Ident(ref value) if value.eq_ignore_ascii_case("auto") => {
-                    return Ok(LengthOrPercentageOrAuto::Auto)
+                    return Ok(LengthOrPercentageOrAuto::Auto);
                 },
                 Token::Function(ref name) if name.eq_ignore_ascii_case("calc") => {},
                 _ => return Err(location.new_unexpected_token_error(token.clone())),
@@ -1098,20 +1092,18 @@ impl LengthOrPercentageOrNone {
             match *token {
                 Token::Dimension {
                     value, ref unit, ..
-                }
-                    if num_context.is_ok(context.parsing_mode, value) =>
-                {
+                } if num_context.is_ok(context.parsing_mode, value) => {
                     return NoCalcLength::parse_dimension(context, value, unit)
                         .map(LengthOrPercentageOrNone::Length)
-                        .map_err(|()| location.new_unexpected_token_error(token.clone()))
+                        .map_err(|()| location.new_unexpected_token_error(token.clone()));
                 },
                 Token::Percentage { unit_value, .. }
                     if num_context.is_ok(context.parsing_mode, unit_value) =>
                 {
                     return Ok(LengthOrPercentageOrNone::Percentage(computed::Percentage(
                         unit_value,
-                    )))
-                },
+                    )));
+                }
                 Token::Number { value, .. } if num_context.is_ok(context.parsing_mode, value) => {
                     if value != 0. &&
                         !context.parsing_mode.allows_unitless_lengths() &&
@@ -1125,7 +1117,7 @@ impl LengthOrPercentageOrNone {
                 },
                 Token::Function(ref name) if name.eq_ignore_ascii_case("calc") => {},
                 Token::Ident(ref value) if value.eq_ignore_ascii_case("none") => {
-                    return Ok(LengthOrPercentageOrNone::None)
+                    return Ok(LengthOrPercentageOrNone::None);
                 },
                 _ => return Err(location.new_unexpected_token_error(token.clone())),
             }
diff --git a/servo/components/style/values/specified/mod.rs b/servo/components/style/values/specified/mod.rs
index 5d80fc585603..a73252bbeb67 100644
--- a/servo/components/style/values/specified/mod.rs
+++ b/servo/components/style/values/specified/mod.rs
@@ -138,7 +138,7 @@ fn parse_number_with_clamping_mode<'i, 't>(
             return Ok(Number {
                 value: value.min(f32::MAX).max(f32::MIN),
                 calc_clamping_mode: None,
-            })
+            });
         },
         Token::Function(ref name) if name.eq_ignore_ascii_case("calc") => {},
         ref t => return Err(location.new_unexpected_token_error(t.clone())),
@@ -828,7 +828,7 @@ impl Attr {
                             Some(ns) => ns,
                             None => {
                                 return Err(location
-                                    .new_custom_error(StyleParseErrorKind::UnspecifiedError))
+                                    .new_custom_error(StyleParseErrorKind::UnspecifiedError));
                             },
                         };
                         Some((prefix, ns))
diff --git a/servo/components/style/values/specified/source_size_list.rs b/servo/components/style/values/specified/source_size_list.rs
index fd07dc8007fd..b27bc2875a6e 100644
--- a/servo/components/style/values/specified/source_size_list.rs
+++ b/servo/components/style/values/specified/source_size_list.rs
@@ -4,13 +4,13 @@
 
 //! https://html.spec.whatwg.org/multipage/#source-size-list
 
-use app_units::Au;
 #[cfg(feature = "gecko")]
 use crate::gecko_bindings::sugar::ownership::{HasBoxFFI, HasFFI, HasSimpleFFI};
 use crate::media_queries::{Device, MediaCondition};
 use crate::parser::{Parse, ParserContext};
 use crate::values::computed::{self, ToComputedValue};
 use crate::values::specified::{Length, NoCalcLength, ViewportPercentageLength};
+use app_units::Au;
 use cssparser::{Delimiter, Parser, Token};
 use selectors::context::QuirksMode;
 use style_traits::ParseError;
@@ -118,7 +118,7 @@ impl SourceSizeList {
                     return Self {
                         source_sizes,
                         value: Some(value),
-                    }
+                    };
                 },
                 Ok(SourceSizeOrLength::SourceSize(source_size)) => {
                     source_sizes.push(source_size);
diff --git a/servo/components/style/values/specified/text.rs b/servo/components/style/values/specified/text.rs
index 4733864f7bdc..3a5663c4bfd1 100644
--- a/servo/components/style/values/specified/text.rs
+++ b/servo/components/style/values/specified/text.rs
@@ -91,8 +91,7 @@ impl Parse for LineHeight {
         match ident {
             ref ident if ident.eq_ignore_ascii_case("normal") => Ok(GenericLineHeight::Normal),
             #[cfg(feature = "gecko")]
-            ref ident if ident.eq_ignore_ascii_case("-moz-block-height") =>
-            {
+            ref ident if ident.eq_ignore_ascii_case("-moz-block-height") => {
                 Ok(GenericLineHeight::MozBlockHeight)
             },
             ident => {
diff --git a/servo/components/style/values/specified/time.rs b/servo/components/style/values/specified/time.rs
index 22ef8053cca7..740232f5cbc7 100644
--- a/servo/components/style/values/specified/time.rs
+++ b/servo/components/style/values/specified/time.rs
@@ -92,12 +92,10 @@ impl Time {
             // ParsingMode::DEFAULT directly.
             Ok(&Token::Dimension {
                 value, ref unit, ..
-            })
-                if clamping_mode.is_ok(ParsingMode::DEFAULT, value) =>
-            {
+            }) if clamping_mode.is_ok(ParsingMode::DEFAULT, value) => {
                 return Time::parse_dimension(value, unit, /* from_calc = */ false)
                     .map_err(|()| location.new_custom_error(StyleParseErrorKind::UnspecifiedError));
-            }
+            },
             Ok(&Token::Function(ref name)) if name.eq_ignore_ascii_case("calc") => {},
             Ok(t) => return Err(location.new_unexpected_token_error(t.clone())),
             Err(e) => return Err(e.into()),
diff --git a/servo/components/style_derive/cg.rs b/servo/components/style_derive/cg.rs
index 7508bad9a8be..b963e326c045 100644
--- a/servo/components/style_derive/cg.rs
+++ b/servo/components/style_derive/cg.rs
@@ -172,9 +172,7 @@ fn path_to_ident(path: &Path) -> Option<&Ident> {
         Path {
             leading_colon: None,
             ref segments,
-        }
-            if segments.len() == 1 =>
-        {
+        } if segments.len() == 1 => {
             if segments[0].arguments.is_empty() {
                 Some(&segments[0].ident)
             } else {
diff --git a/servo/components/style_derive/parse.rs b/servo/components/style_derive/parse.rs
index 9042b12d9883..9e3ddccc4539 100644
--- a/servo/components/style_derive/parse.rs
+++ b/servo/components/style_derive/parse.rs
@@ -43,7 +43,7 @@ pub fn derive(input: DeriveInput) -> TokenStream {
         saw_condition |= parse_attrs.condition.is_some();
         let condition = match parse_attrs.condition {
             Some(ref p) => quote! { if #p(context) },
-            None => quote!{},
+            None => quote! {},
         };
 
         let mut body = quote! {
diff --git a/servo/components/style_traits/lib.rs b/servo/components/style_traits/lib.rs
index 9984854ea495..09f5997da8ac 100644
--- a/servo/components/style_traits/lib.rs
+++ b/servo/components/style_traits/lib.rs
@@ -48,10 +48,7 @@ pub enum DevicePixel {}
 /// Represents a mobile style pinch zoom factor.
 /// TODO(gw): Once WR supports pinch zoom, use a type directly from webrender_api.
 #[derive(Clone, Copy, Debug, PartialEq)]
-#[cfg_attr(
-    feature = "servo",
-    derive(Deserialize, Serialize, MallocSizeOf)
-)]
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize, MallocSizeOf))]
 pub struct PinchZoomFactor(f32);
 
 impl PinchZoomFactor {
diff --git a/servo/components/style_traits/viewport.rs b/servo/components/style_traits/viewport.rs
index f9fb57526994..f1aa18412e32 100644
--- a/servo/components/style_traits/viewport.rs
+++ b/servo/components/style_traits/viewport.rs
@@ -28,10 +28,7 @@ define_css_keyword_enum! {
 ///
 /// <https://drafts.csswg.org/css-device-adapt/#viewport-desc>
 #[derive(Clone, Debug, PartialEq)]
-#[cfg_attr(
-    feature = "servo",
-    derive(Deserialize, Serialize, MallocSizeOf)
-)]
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize, MallocSizeOf))]
 pub struct ViewportConstraints {
     /// Width and height:
     ///  * https://drafts.csswg.org/css-device-adapt/#width-desc