cleanup: Don't linebreak before closing parentheses

Otherwise recent versions of eslint want "dangling" commas,
which is at least ugly considering that most functions don't
allow adding arguments at leasure.

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1177

js/ui/lookingGlass.js

@@ -39,8 +39,7 @@ function _getAutoCompleteGlobalKeywords() {
     const keywords = ['true', 'false', 'null', 'new'];
     // Don't add the private properties of globalThis (i.e., ones starting with '_')
     const windowProperties = Object.getOwnPropertyNames(globalThis).filter(
-        a => a.charAt(0) != '_'
-    );
+        a => a.charAt(0) !== '_');
     const headerProperties = JsParse.getDeclaredConstants(commandHeader);
 
     return keywords.concat(windowProperties).concat(headerProperties);