Cleanup: fix some CSS comment styles (especially copyrights)

ui/webui/resources/css/tree.css

Index: ui/webui/resources/css/tree.css
diff --git a/ui/webui/resources/css/tree.css b/ui/webui/resources/css/tree.css
index a86baba5b08d53090e1b3f5578ced6b68624a503..103f1aaae2d0672d578eeab2c1b01e64c38ae638 100644
--- a/ui/webui/resources/css/tree.css
+++ b/ui/webui/resources/css/tree.css
@@ -63,13 +63,8 @@ html[dir=rtl] .expand-icon {
   z-index: 1;
 }
 
-/*
-  WebKit has a bug with attribute selectors so we apply selected to the tree row
-  as well.
-
-  https://bugs.webkit.org/show_bug.cgi?id=12519
-
-*/
+/* WebKit has a bug with attribute selectors so we apply selected to the tree
+ * row as well. https://bugs.webkit.org/show_bug.cgi?id=12519. */
 .tree-row[selected] {
   background-image: -webkit-linear-gradient(rgba(255, 255, 255, 0.8),
                                             rgba(255,255,255,0));