[gnome-shell] cleanup: Fix style nits in last commit

[Florian Müllner <fmuellner src gnome org>]

commit 54736377368989c73fdb03cc0ad87e86350d43dd
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Jul 8 20:14:35 2019 +0200

    cleanup: Fix style nits in last commit
    
    Missing space after catch and wrong double quotes.

 js/ui/endSessionDialog.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/endSessionDialog.js b/js/ui/endSessionDialog.js
index f4950ba84..ead7eae78 100644
--- a/js/ui/endSessionDialog.js
+++ b/js/ui/endSessionDialog.js
@@ -353,8 +353,8 @@ class EndSessionDialog extends ModalDialog.ModalDialog {
         // It only makes sense to check for this permission if PackageKit is available.
         try {
             this._updatesPermission = Polkit.Permission.new_sync(
-                "org.freedesktop.packagekit.trigger-offline-update", null, null);
-        } catch(e) {
+                'org.freedesktop.packagekit.trigger-offline-update', null, null);
+        } catch (e) {
             log('No permission to trigger offline updates: %s'.format(e.toString()));
         }
     }