servo: Merge #16023 - style: Fix some nits (from emilio:nits); r=emilio

I was looking at the code that used Length for #16015, and found these two.

Source-Repo: https://github.com/servo/servo
Source-Revision: 7fcba10614941d2c703c710227ec7367574e892f

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : b59615543c81e3c8b2eabd2320aec83a628dd47a

servo/components/style/properties/longhand/padding.mako.rs

@@ -13,11 +13,11 @@
             spec = "https://drafts.csswg.org/css-logical-props/#propdef-padding-%s" % side[1]
     %>
     ${helpers.predefined_type("padding-%s" % side[0], "LengthOrPercentage",
-                               "computed::LengthOrPercentage::Length(Au(0))",
-                               "parse_non_negative",
-                               alias=maybe_moz_logical_alias(product, side, "-moz-padding-%s"),
-                               needs_context=False,
-                               animatable=True,
-                               logical = side[1],
-                               spec = spec)}
+                              "computed::LengthOrPercentage::Length(Au(0))",
+                              "parse_non_negative",
+                              alias=maybe_moz_logical_alias(product, side, "-moz-padding-%s"),
+                              needs_context=False,
+                              animatable=True,
+                              logical = side[1],
+                              spec = spec)}
 % endfor

servo/components/style/values/specified/length.rs

@@ -369,9 +369,6 @@ pub enum Length {
     /// A calc expression.
     ///
     /// https://drafts.csswg.org/css-values/#calc-notation
-    ///
-    /// TODO(emilio): We have more `Calc` variants around, we should only use
-    /// one.
     Calc(Box<CalcLengthOrPercentage>, AllowedNumericType),
 }