I find "lei rediff" useful when writing replies to patch emails. Like any good *nix tool, my $EDITOR allows piping either the full or partial editor buffer into arbitrary commands. Besides typing text, the most important feature of my editor is the ability to run/pipe-to arbitrary commands (e.g. git-am, lei blob, git-show); and "lei rediff" is a new one. I barely customize my editor; however, I do have some editor macros for quickly stripping and adding quote prefixes (at least the standard "> " mail quoting style, along with '#' for sh/Perl). But maybe others do not have these macros, so I wonder if "rediff" should support --dequote and --requote switches to ease this usage pattern. Or/and if "lei dequote" and "lei quote" should exist as (slower) replacements for `sed 's/^[> ]\+//'` and `sed 's/^/> /'`, respectively.