(beginning-of-defun-raw): Add regexp

matching open parenthesis in column 0 to defun-prompt-regexp
only if open-paren-in-column-0-is-defun-start is set.

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/emacs-lisp/lisp.el b/lisp/emacs-lisp/lisp.el
index 9759c41d975..c484a12dc8d 100644
--- a/lisp/emacs-lisp/lisp.el
+++ b/lisp/emacs-lisp/lisp.el
@@ -173,7 +173,8 @@ is called as a function to find the defun's beginning."
       (funcall beginning-of-defun-function)
     (and arg (< arg 0) (not (eobp)) (forward-char 1))
     (and (re-search-backward (if defun-prompt-regexp
-                                 (concat "^\\s(\\|"
+                                 (concat (if open-paren-in-column-0-is-defun-start
+                                             "^\\s(\\|" "")
                                          "\\(" defun-prompt-regexp "\\)\\s(")
                                "^\\s(")
                              nil 'move (or arg 1))