RFR: Section on PRs [v2]

Sat Apr 9 01:41:45 UTC 2022

On Wed, 6 Apr 2022 19:25:48 GMT, Jesper Wilhelmsson <jwilhelm at openjdk.org> wrote:

>> Some tips for creating pull requests.
>
> Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added sentence about keeping PR up to date

Thank you all for your reviews! There were many good suggestions here. I have tried to accommodate them all.

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PR: https://git.openjdk.java.net/guide/pull/79