boxes: Remove double whitespace

Spotted while debugging https://gitlab.gnome.org/GNOME/mutter/-/issues/64

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2236>
This commit is contained in:
Björn Daase 2022-01-14 19:10:20 +01:00
parent ad08e9e155
commit ee96ba44f9