Pull request commit emails don't include commit body message

When I give feedback on a pull request the author sometimes responds with changes. The commit messages of those changes are then sent as email communication of the pull request. Unfortunately the commit messages only display the subject (first line) of the commit message. It doesn't include part of the body of the commit message like is shown in the pull request commits interface on the website. Not showing the body of the commit message can make the utility of these messages less useful.

This is a request to have the body also included in the email, if appropriate, as it is in the website interface.