David Kastrup [off-list ref] writes:
I'd like to see some changes for mergetool's Emacs support: in
moderately current versions of Emacs and XEmacs, ediff is a much
preferable tool to emerge.
Between ediff and emerge, I think Ted gave a well thought out
analysis on the list earlier, so you might want to consider the
issues he raised if/when you tackle this.
This is late in the game, however, so your change probably won't
be merged before I can tag 1.5.3 final, but I'd expect that a
better Emacs support will be widely welcomed.