RFR: webrev: not all commits changes files

[Robin Westberg]

On Sun, 30 Aug 2020 04:42:34 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this small patch that updates webrev's JSON generator to handle commits that don't change any files. This
> can happen for example with trivial merges (since we use the `-c` flag to `git log`).
> Thanks,
> Erik

Looks good!

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Marked as reviewed by rwestberg (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/754