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/calendar.js

@@ -168,7 +168,7 @@ var DBusEventSource = class DBusEventSource {
             try {
                 this._dbusProxy.init_finish(result);
                 loaded = true;
-            } catch(e) {
+            } catch (e) {
                 if (e.matches(Gio.DBusError, Gio.DBusError.TIMED_OUT)) {
                     // Ignore timeouts and install signals as normal, because with high
                     // probability the service will appear later on, and we will get a