More minor regex cleanup
Problems reported by Mattias Engdegård in: https://lists.gnu.org/r/emacs-devel/2019-03/msg00643.html plus a few others that I noticed. * lisp/auth-source-pass.el (auth-source-pass--parse-data): * lisp/org/org-datetree.el (org-datetree--find-create): * lisp/org/org-pcomplete.el (org-thing-at-point): * lisp/progmodes/js.el (js--end-of-do-while-loop-p): * lisp/textmodes/sgml-mode.el: (sgml-electric-tag-pair-before-change-function): * lisp/textmodes/texnfo-upd.el (texinfo-menu-copy-old-description): * lisp/url/url-http.el (url-http-parse-response): Fix regular expression and similar syntax.