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/ui/environment.js

@@ -114,7 +114,7 @@ function init() {
                 return base.replace(/\]$/, ' delegate for ' + this.actor.toString().substring(1));
             else
                 return base;
-        } catch(e) {
+        } catch (e) {
             return base;
         }
     };