cleanup: Fix missing/stray spaces

Those are wrong according to our style guidelines, but the previous
eslint ruleset didn't catch them.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/805

js/misc/fileUtils.js

@@ -75,7 +75,7 @@ let _ifaceResource = null;
 function loadInterfaceXML(iface) {
     if (!_ifaceResource) {
         // don't use global.datadir so the method is usable from tests/tools
-        let dir = GLib.getenv ('GNOME_SHELL_DATADIR') || Config.PKGDATADIR;
+        let dir = GLib.getenv('GNOME_SHELL_DATADIR') || Config.PKGDATADIR;
         let path = `${dir}/gnome-shell-dbus-interfaces.gresource`;
         _ifaceResource = Gio.Resource.load(path);
         _ifaceResource._register();