As a committer, when drafting a message, I can hit a keyboard shortcut (e.g. Ctrl+Alt+L in IntellJ) that will automatically wrap (and insert appropriate line breaks to make) all entered text fit within the configured line width so that I don't have to manually enter these line breaks.

I would love to have this functionality as it's a standard interaction from w/in my IDE.  I currently swap back to IntelliJ to get some of the missing auto-format functionality.  Personally, I don't want an "autoformat on commit" as that could change the layout in a way that I can't correct before commit.