* lisp/emacs-lisp/helpers.el (string-blank-p): Use `string-match-p'.

lisp/ChangeLog

@@ -1,3 +1,7 @@
+2013-12-07  Bozhidar Batsov  <bozhidar@batsov.com>
+
+	* emacs-lisp/helpers.el (string-blank-p): Use `string-match-p'.
+
 2013-12-07  Tassilo Horn  <tsdh@gnu.org>
 
 	* help-fns.el (describe-function-1): Use new advice-* functions

lisp/emacs-lisp/helpers.el

@@ -67,7 +67,7 @@
 
 (defsubst string-blank-p (string)
   "Check whether STRING is either empty or only whitespace."
-  (string-empty-p (string-trim string)))
+  (string-match-p "\\`[ \t\n\r]*\\'" string))
 
 (provide 'helpers)