Open auto completion does not escape spaces

[desbma]

Summary

When a path contains spaces, the :open command completion sets it as is (without escaping the spaces), which leads to incorrect path.

Reproduction Steps

In a shell:

$ mkdir -p '/tmp/a b'
$ echo hi > '/tmp/a b/c'

In hx:

:open /tmp/a<TAB>

hx autocompletes to /tmp/a b.
Hitting then <TAB> does not autocomplete to '/tmp/a b/c', typing /c<ENTER> makes hx open two files /tmp/a and b/c.

I expected this to happen:
autocomplete as /tmp/a\ b like bash & co do.

Helix log

No response

Platform

Linux

Terminal Emulator

alacritty

Helix Version

helix 22.08.1 (66276ce)