Jakob Hellermann d212becdba cli: complete: use null Ui to prevent writing warnings into completions
E.g. when the user doesn't have the default command set, you don't want
to get
```
Warning: Cannot define an alias that overrides the built-in command 'log'
```
printed on every completion.
2025-02-01 08:37:22 +00:00
..
2025-01-14 01:13:13 +00:00