rustdoc: Fix some minor issues per reviewer

src/librustdoc/html/static/main.js

@@ -1661,18 +1661,18 @@
             }
             if (hasClass(relatedDoc, "docblock")) {
                 var action = mode;
-                if (action == "toggle") {
+                if (action === "toggle") {
                     if (hasClass(relatedDoc, "hidden-by-usual-hider")) {
                         action = "show";
                     } else {
                         action = "hide";
                     }
                 }
-                if (action == "hide") {
+                if (action === "hide") {
                     addClass(relatedDoc, "hidden-by-usual-hider");
                     onEach(toggle.childNodes, adjustToggle(true));
                     addClass(toggle.parentNode, 'collapsed');
-                } else if (action == "show") {
+                } else if (action === "show") {
                     removeClass(relatedDoc, "hidden-by-usual-hider");
                     removeClass(toggle.parentNode, 'collapsed');
                     onEach(toggle.childNodes, adjustToggle(false));
@@ -1715,12 +1715,14 @@
                 relatedDoc = relatedDoc.nextElementSibling;
             }
 
-            if (!relatedDoc) return;
+            if (!relatedDoc) {
+                return;
+            }
 
             // Hide all functions, but not associated types/consts
 
             var action = mode;
-            if (action == "toggle") {
+            if (action === "toggle") {
                 if (hasClass(relatedDoc, "fns-now-collapsed")) {
                     action = "show";
                 } else {
@@ -1728,11 +1730,11 @@
                 }
             }
 
-            if(action == "show") {
+            if (action === "show") {
                 removeClass(relatedDoc, "fns-now-collapsed");
                 onEach(toggle.childNodes, adjustToggle(false));
                 onEach(relatedDoc.childNodes, implHider(false));
-            } else if (action == "hide") {
+            } else if (action === "hide") {
                 addClass(relatedDoc, "fns-now-collapsed");
                 onEach(toggle.childNodes, adjustToggle(true));
                 onEach(relatedDoc.childNodes, implHider(true));

src/librustdoc/html/static/rustdoc.css

@@ -1189,3 +1189,8 @@ kbd {
 		z-index: 1;
 	}
 }
+
+.hidden-by-impl-hider,
+.hidden-by-usual-hider {
+	display: none;
+}

src/librustdoc/html/static/themes/dark.css

@@ -386,8 +386,3 @@ kbd {
 		background: #353535;
 	}
 }
-
-.hidden-by-impl-hider, 
-.hidden-by-usual-hider {
-	display: none;
-}

src/librustdoc/html/static/themes/main.css

@@ -383,8 +383,3 @@ kbd {
 		background: #fff;
 	}
 }
-
-.hidden-by-impl-hider, 
-.hidden-by-usual-hider {
-	display: none;
-}