* lisp/mail/sendmail.el (mail-citation-prefix-regexp): Don't
regard "]" as a citation prefix character (bug#25150). This
allows some motion commands (like forward-sexp) to behave more as
expected in Message mode buffers.
Copyright-paperwork-exempt: yes
;;;###autoload
(defcustom mail-citation-prefix-regexp
- (purecopy "\\([ \t]*\\(\\w\\|[_.]\\)+>+\\|[ \t]*[]>|]\\)+")
+ (purecopy "\\([ \t]*\\(\\w\\|[_.]\\)+>+\\|[ \t]*[>|]\\)+")
"Regular expression to match a citation prefix plus whitespace.
It should match whatever sort of citation prefixes you want to handle,
with whitespace before and after; it should also match just whitespace.