cleanup: Remove trailing spaces

We generally avoid these (not least because Linus hates them enough
to make git complain loudly), but some sneaked in over time ...

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/731

js/ui/status/thunderbolt.js

@@ -156,12 +156,12 @@ var AuthRobot = class {
 
         /* check if authorization is enabled in the daemon. if not
          * we won't even bother authorizing, because we will only
-         * get an error back. The exact contents of AuthMode might 
+         * get an error back. The exact contents of AuthMode might
          * change in the future, but must contain AuthMode.ENABLED
          * if it is enabled. */
         if (!cli.authMode.split('|').includes(AuthMode.ENABLED))
             return;
-        
+
         /* check if we should enroll the device */
         let res = [false];
         this.emit('enroll-device', dev, res);