RFR: vcs: don't append newlines to tag messages

[Robin Westberg]

On Mon, 24 Aug 2020 13:00:30 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this small patch that ensures that neither git nor hg append any newlines to message used when creating
> annotated tag objects.
> Testing:
> - [x] `make test` passes on Linux x64
> - [x] Updated two unit tests
> 
> Thanks,
> Erik

Looks good!

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Marked as reviewed by rwestberg (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/734