style: Run rustfmt on servo/components/style and servo/ports/geckolib

This patch is generated by running `cargo +nightly fmt` under
`servo/components/style/` and `servo/ports/geckolib` against mozilla-central
https://hg.mozilla.org/mozilla-central/rev/b193f2e7a6a5d1f042c957ea4acd5c89bf210512

My nightly version is: 1.58.0-nightly (c9c4b5d72 2021-11-17)

Manually remove the redundant braces in author_styles.rs to fix a warning.

Differential Revision: https://phabricator.services.mozilla.com/D131556

components/style/stylesheets/stylesheet.rs

@@ -591,9 +591,11 @@ impl Clone for Stylesheet {
         // Make a deep clone of the media, using the new lock.
         let media = self.media.read_with(&guard).clone();
         let media = Arc::new(lock.wrap(media));
-        let contents = Arc::new(self
-            .contents
-            .deep_clone_with_lock(&lock, &guard, &DeepCloneParams));
+        let contents = Arc::new(self.contents.deep_clone_with_lock(
+            &lock,
+            &guard,
+            &DeepCloneParams,
+        ));
 
         Stylesheet {
             contents,