It's important not to destroy whitespace in e.g. patches.
" Use only 65 characters per line as given in rfc1855.
setlocal textwidth=65
" Use only 65 characters per line as given in rfc1855.
setlocal textwidth=65
-" Replace trailing spaces except after mail headers (To:, etc.) or a signature
-" delimiter (-- ).
-silent! %s/\(^\([a-zA-z-]\+:\|--\)\)\@<!\s\+$//
+" Replace trailing whitespace after quotes.
+silent! %s/\(^>.\+\)\@<=\s\+$//
" Remove spaces between quotes (> > to >>).
silent! %s/^\(>\+\) >/\1>/g
silent! %s/^\(>\+\) >/\1>/g
" Remove spaces between quotes (> > to >>).
silent! %s/^\(>\+\) >/\1>/g
silent! %s/^\(>\+\) >/\1>/g