patch 7.4.710

Problem:    It is not possible to make spaces visibible in list mode.
Solution:   Add the "space" item to 'listchars'. (David Bürgin, issue 350)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    710,
 /**/
     709,
 /**/