From: Philipp Stephani <phst@google.com>
Date: Mon, 29 Jan 2018 23:05:58 +0000 (+0100)
Subject: * lisp/emacs-lisp/rx.el (rx): Fix the definition of 'blank'.
X-Git-Tag: emacs-26.1-rc1~296
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=956807bd1fc2d102714282fdfbb8d2a549dc8e17;p=emacs.git

* lisp/emacs-lisp/rx.el (rx): Fix the definition of 'blank'.
---

diff --git a/lisp/emacs-lisp/rx.el b/lisp/emacs-lisp/rx.el
index 37aa25b556d..c4f6d4f70ea 100644
--- a/lisp/emacs-lisp/rx.el
+++ b/lisp/emacs-lisp/rx.el
@@ -57,7 +57,6 @@
 ;; (rx (and line-start (0+ (in "a-z"))))
 ;;
 ;; "\n[^ \t]"
-;; (rx (and "\n" (not blank))), or
 ;; (rx (and "\n" (not (any " \t"))))
 ;;
 ;; "\\*\\*\\* EOOH \\*\\*\\*\n"
@@ -74,9 +73,9 @@
 ;; "^content-transfer-encoding:\\(\n?[\t ]\\)*quoted-printable\\(\n?[\t ]\\)*"
 ;; (rx (and line-start
 ;;          "content-transfer-encoding:"
-;;          (+ (? ?\n)) blank
+;;          (+ (? ?\n)) (any " \t")
 ;;	    "quoted-printable"
-;;	    (+ (? ?\n)) blank))
+;;	    (+ (? ?\n)) (any " \t"))
 ;;
 ;; (concat "^\\(?:" something-else "\\)")
 ;; (rx (and line-start (eval something-else))), statically or
@@ -962,7 +961,11 @@ CHAR
      matches 0 through 9, a through f and A through F.
 
 `blank'
-     matches space and tab only.
+     matches horizontal whitespace, as defined by Annex C of the
+     Unicode Technical Standard #18.  In particular, it matches
+     spaces, tabs, and other characters whose Unicode
+     `general-category' property indicates they are spacing
+     separators.
 
 `graphic', `graph'
      matches graphic characters--everything except whitespace, ASCII