Thanks, Bastien! Just found the "Preferred way of submitting patches" document.
Quoth Bastien on Prickle-Prickle, the 24th of Chaos: > Hi Peter, > > Peter Danenberg <p...@roxygen.org> writes: > > > It's been irritating me that after saving an edit buffer, the undo > > history disappears; the attached patch restores the undo history. > > Applied. > > Next time, please provide a full patch (with an Emacs ChangeLog > message) with git format-patch. > > Thanks, > > -- > Bastien >