kas for-all-repos: Strange error formatting

[Jörg Sommer]

Hi,


```
% ./kas-container for-all-repos .config.yaml "false with arg"
2026-02-03 19:25:57 - INFO - kas 5.1 started on Debian GNU/Linux 13
2026-02-03 19:25:58 - INFO - /work/bitbake$ false with arg
2026-02-03 19:25:58 - ERROR - Command "f a l s e ' ' w i t h ' ' a r g" failed with error 1
```

The formatting of the command looks strange. Is this intended?

Should this work?

```
% ./kas-container for-all-repos "bad command"
docker: invalid spec: :/repo:ro: empty section between colons

Run 'docker run --help' for more information
```


Best regards Jörg

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