RFR: cli: add debug command commit-comments

[Robin Westberg]

On Mon, 15 Feb 2021 12:23:09 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this small patch that adds a utility debug command, `git skara debug commit-comments`, that lists recent commit comments for a given remote repository.
> 
> Testing:
> - [x] Manual testing on Linux x64
> 
> Thanks,
> Erik

Looks good!

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Marked as reviewed by rwestberg (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/1013