Problems reported by Mattias Engdegård in: https://lists.gnu.org/r/emacs-devel/2019-12/msg00066.html * lisp/gnus/gnus-util.el (gnus-emacs-version): * lisp/mail/rfc2368.el (rfc2368-mailto-regexp): * lisp/net/tramp-sh.el (tramp-sh-inotifywait-process-filter): * lisp/obsolete/terminal.el (te-parse-program-and-args): * lisp/org/org-table.el (org-table-wrap-region): * lisp/progmodes/verilog-mode.el (verilog-inject-inst): Avoid repetition-of-repetition in regexp.