Fix usage of the jQuery global in a few spots.

- jQuery changed to $ in some files because there is a closure that creates a locally scoped $, but the jQuery var is globally scoped, meaning using jQuery instead of $ inside that closure could result in interacting with a different instance of jQuery than the uses of $ in that same closure.
- In mwExtension wrap the code inside a closure which it is missing. Also take this chance to fix the whitespace style `fn( arg )` instead of `fn(arg)` on the isArray I added.
This is partially a followup to r94331.

Note: The jquery plugins inside the jquery/ folder look fine for use of jQuery within closures, except for mockjax.

1 files changed, 1 insertions, 1 deletions

diff --git a/resources/mediawiki/mediawiki.util.js b/resources/mediawiki/mediawiki.util.js
index a720f58333e4..e6bb9fb6ff6c 100644
--- a/resources/mediawiki/mediawiki.util.js
+++ b/resources/mediawiki/mediawiki.util.js
@@ -267,7 +267,7 @@
 
 				return;
 
-			} else if ( nodeList instanceof jQuery ) {
+			} else if ( nodeList instanceof $ ) {
 				$nodes = nodeList;
 			} else {
 				$nodes = $( nodeList );