contrib / emacs / git.elon commit subtree: performance improvement for finding unexpected parent commits (19ad68d)
   1(error "git.el no longer ships with git. It's recommended to
   2replace its use with Magit, or simply delete references to git.el
   3in your initialization file(s). See contrib/emacs/README in git's
   4sources (https://github.com/git/git/blob/master/contrib/emacs/README)
   5for suggested alternatives and for why this happened. Emacs's own
   6VC mode and Magit are viable alternatives.")