This reverts commit 6e12ef4a7b
> Paths with spaces were already working. The original bug is most
> likely with user's terminal desktop entry, file manager or DE, and has
> nothing to do with nvim.desktop.
These are 3 different implementations that work correctly with unquoted %F and spaces:
```
$ DE=generic xdg-open "D I R/F I L E.txt" # pure bash
$ gio open "D I R/F I L E.txt" # glib2
$ handlr open "D I R/F I L E.txt" # rust
```
(cherry picked from commit 07a207a5f1)