servo: Merge #7245 - replace len() !=0 with !is_empty() (from jxs:master); r=Ms2ger

Source-Repo: https://github.com/servo/servo
Source-Revision: d90907cb5f7399196b76b3117e19ff4d1b775a96

servo/components/gfx/display_list/mod.rs

@@ -213,7 +213,7 @@ impl DisplayList {
         };
 
         doit(&(self.all_display_items()));
-        if self.children.len() != 0 {
+        if !self.children.is_empty() {
             println!("{} Children stacking contexts list length: {}",
                      indentation,
                      self.children.len());

servo/components/layout/flow.rs

@@ -244,7 +244,7 @@ pub trait Flow: fmt::Debug + Sync {
         match self.class() {
             FlowClass::Block |
             FlowClass::TableCaption |
-            FlowClass::TableCell if base(self).children.len() != 0 => {
+            FlowClass::TableCell if !base(self).children.is_empty() => {
                 // FIXME(#2795): Get the real container size.
                 let container_size = Size2D::zero();
                 for kid in mut_base(self).children.iter_mut() {

servo/tests/unit/net/hsts.rs

@@ -275,7 +275,7 @@ fn test_hsts_list_with_expired_entry_is_not_is_host_secure() {
 #[test]
 fn test_preload_hsts_domains_well_formed() {
     let hsts_list = preload_hsts_domains().unwrap();
-    assert!(hsts_list.entries.len() != 0);
+    assert!(!hsts_list.entries.is_empty());
 }
 
 #[test]
@@ -301,4 +301,3 @@ fn test_secure_url_forces_an_http_host_in_list_to_https() {
 
     assert_eq!(&secure.scheme, "https");
 }
-