* longlines.el (longlines-wrap-line, longlines-encode-region): Preserve text properties.

Fixes: debbugs:1425

lisp/ChangeLog

@@ -1,3 +1,8 @@
+2012-11-30  Chong Yidong  <cyd@gnu.org>
+
+	* longlines.el (longlines-wrap-line, longlines-encode-region):
+	Preserve text properties (Bug#1425).
+
 2012-11-30  OKAZAKI Tetsurou  <okazaki.tetsurou@gmail.com>  (tiny change)
 
 	* vc/vc.el (vc-register): Allow registering a file which is

lisp/longlines.el

@@ -278,7 +278,7 @@ end of the buffer."
 If wrapping is performed, point remains on the line.  If the line does
 not need to be wrapped, move point to the next line and return t."
   (if (longlines-set-breakpoint)
-      (progn (insert-before-markers ?\n)
+      (progn (insert-before-markers-and-inherit ?\n)
 	     (backward-char 1)
              (delete-char -1)
 	     (forward-char 1)
@@ -384,8 +384,12 @@ compatibility with `format-alist', and is ignored."
 	  (mod (buffer-modified-p)))
       (goto-char (min beg end))
       (while (search-forward "\n" reg-max t)
-        (unless (get-text-property (match-beginning 0) 'hard)
-          (replace-match " ")))
+	(let ((pos (match-beginning 0)))
+	  (unless (get-text-property pos 'hard)
+	    (goto-char (1+ pos))
+	    (insert-and-inherit " ")
+	    (delete-region pos (1+ pos))
+	    (remove-text-properties pos (1+ pos) 'hard))))
       (set-buffer-modified-p mod)
       end)))