style: Use space after catch

We are currently inconsistent with whether or not to put a space
after catch clauses. While the predominant style is to omit it,
that's inconsistent with the style we use for any other statement.
There's not really a good reason to stick with it, so switch to
the style gjs/eslint default to.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/607

js/misc/extensionUtils.js

@@ -235,7 +235,7 @@ var ExtensionFinder = class {
                                                        : ExtensionType.SYSTEM;
         try {
             extension = createExtensionObject(uuid, extensionDir, type);
-        } catch(e) {
+        } catch (e) {
             logError(e, 'Could not load extension %s'.format(uuid));
             return;
         }