* lisp/cus-edit.el (custom-save-variables): Pretty-print long values.

Fixes: debbugs:14187

lisp/ChangeLog

@@ -1,3 +1,8 @@
+2013-05-08  Adam Spiers  <emacs@adamspiers.org>
+
+	* cus-edit.el (custom-save-variables):
+	Pretty-print long values.  (Bug#14187)
+
 2013-05-08  Glenn Morris  <rgm@gnu.org>
 
 	* progmodes/m4-mode.el (m4-program): Assume it is in PATH.

lisp/cus-edit.el

@@ -4531,7 +4531,15 @@ This function does not save the buffer."
 	    (princ " '(")
 	    (prin1 symbol)
 	    (princ " ")
-	    (prin1 (car value))
+	    (let ((val (prin1-to-string (car value))))
+	      (if (< (length val) 60)
+		  (insert val)
+		(newline-and-indent)
+		(let ((beginning-of-val (point)))
+		  (insert val)
+		  (save-excursion
+		    (goto-char beginning-of-val)
+		    (indent-pp-sexp 1)))))
 	    (when (or now requests comment)
 	      (princ " ")
 	      (prin1 now)