patch 8.0.1831: sometimes the quickfix title is incorrectly prefixed with ':'

Problem:    Sometimes the quickfix title is incorrectly prefixed with ':'.
Solution:   Prepend the colon in another way. (Yegappan Lakshmanan, closes
            #2905)

src/version.c

@@ -761,6 +761,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1831,
 /**/
     1830,
 /**/