title: Github: use pull request description as merge commit message?
body: <p>Using Github to manage a repo, by default, the pull request <em>title</em> is used as the merge commit message.</p>
  <p>I would like to use the pull request <em>body</em> as the default merge commit message. Yes, I could copy-paste this into the editor whenever merging a PR, but I'd rather automate this part of the process and not rely on the PR author to remember to copy-paste.</p>
  <p>Is there a configuration option to do this somewhere that I'm missing, or a plugin or automated tool that does something like this? Thanks!</p>
  <p>A screenshot of creating a Github PR to make it clear:</p>
  <p><a href="https://i.stack.imgur.com/oIs7P.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oIs7P.png" alt="Github PR creation screen" /></a></p>
  <p>(Note that I'm not looking for evangelism about what PRs or commit messages should look like, just technical advice on how to achieve a specific goal.)</p>