bug#20774: Typo in Patch

[Samuel Freilich <sfreilich@google.com>]

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There was a typo in that previous patch. Should have been regexp-quote, not
regex-quote. Fixed version attached.

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[-- Attachment #2: emacs-auto-fill-different-first-line-fixed.patch --]
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*** simple.el.old	2015-06-08 19:19:20.484397387 -0400
--- simple.el.new	2015-06-08 19:18:58.340305301 -0400
***************
*** 6559,6575 ****
  	       (setq fill-prefix prefix))))
  
        (while (and (not give-up) (> (current-column) fc))
! 	;; Determine where to split the line.
! 	(let* (after-prefix
  	       (fill-point
  		(save-excursion
  		  (beginning-of-line)
! 		  (setq after-prefix (point))
! 		  (and fill-prefix
! 		       (looking-at (regexp-quote fill-prefix))
! 		       (setq after-prefix (match-end 0)))
  		  (move-to-column (1+ fc))
! 		  (fill-move-to-break-point after-prefix)
  		  (point))))
  
  	  ;; See whether the place we found is any good.
--- 6559,6581 ----
  	       (setq fill-prefix prefix))))
  
        (while (and (not give-up) (> (current-column) fc))
!         ;; Determine where to split the line.
!         (let* (line-start
!                after-prefix
  	       (fill-point
  		(save-excursion
  		  (beginning-of-line)
! 		  (setq line-start (point))
!       ;; Skip the fill-prefix. Note that we might be on the first line of the
!       ;; paragraph, and the fist line can differ in adaptive-fill-mode.
!       (when (or (and adaptive-fill-mode
!                      adaptive-fill-first-line-regexp
!                      (looking-at adaptive-fill-first-line-regexp))
!                 (and fill-prefix
!                      (looking-at (regexp-quote fill-prefix))))
!         (setq after-prefix (match-end 0)))
  		  (move-to-column (1+ fc))
! 		  (fill-move-to-break-point (or after-prefix line-start))
  		  (point))))
  
  	  ;; See whether the place we found is any good.
***************
*** 6578,6586 ****
  		(or (bolp)
  		    ;; There is no use breaking at end of line.
  		    (save-excursion (skip-chars-forward " ") (eolp))
! 		    ;; It is futile to split at the end of the prefix
! 		    ;; since we would just insert the prefix again.
! 		    (and after-prefix (<= (point) after-prefix))
  		    ;; Don't split right after a comment starter
  		    ;; since we would just make another comment starter.
  		    (and comment-start-skip
--- 6584,6592 ----
  		(or (bolp)
  		    ;; There is no use breaking at end of line.
  		    (save-excursion (skip-chars-forward " ") (eolp))
! 		    ;; It is futile to split earlier in the line than the length of the
! 		    ;; prefix, since we would just insert the prefix again.
! 		    (and fill-prefix (<= (point) (+ line-start (length fill-prefix))))
  		    ;; Don't split right after a comment starter
  		    ;; since we would just make another comment starter.
  		    (and comment-start-skip