Paul Eggert f9ff60e0d7 Improve regexp advice again, and unchain ranges ... * doc/lispref/searching.texi (Regexp Special): Mention char classes earlier, in a more-logical place. Advise sticking to ASCII letters and digits in ranges. Reword negative advice to make it clearer that it’s negative. * lisp/files.el (make-auto-save-file-name): * lisp/gnus/message.el (message-mailer-swallows-blank-line): * lisp/gnus/nndoc.el (nndoc-lanl-gov-announce-type-p) (nndoc-generate-lanl-gov-head): * lisp/org/org-eshell.el (org-eshell-open): * lisp/org/org.el (org-deadline-time-hour-regexp) (org-scheduled-time-hour-regexp): * lisp/progmodes/bat-mode.el (bat-font-lock-keywords): * lisp/progmodes/bug-reference.el (bug-reference-bug-regexp): * lisp/textmodes/less-css-mode.el (less-css-font-lock-keywords): * lisp/vc/vc-cvs.el (vc-cvs-valid-symbolic-tag-name-p): * lisp/vc/vc-svn.el (vc-svn-valid-symbolic-tag-name-p): Avoid attempts to chain ranges, as this can be confusing. For example, instead of [0-9-_.], use [0-9_.-].		2019-04-02 15:01:34 -07:00
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