Completion not working with commands if no parameter was passed to them

[ivktac]

Summary

Completion not working in command mode if there is not parameter

Also I noticed that if use alias :o completion works without parameter but instead the space between them was deleted

when selected:

Reproduction Steps

I tried this:

1. :open or :theme

I expected this to happen: show completions

Instead, this happened: nothing shown

Helix log

No response

Platform

Linux

Terminal Emulator

zellij

Helix Version

helix 22.08.1 (c803ef87)

[archseer]

Could be a regression from https://github.com/helix-editor/helix/pull/4316

\cc @mitsuhiko