updated for version 7.3.552

Problem:    Formatting inside comments does not use the "2" flag in
            'formatoptions'.
Solution:   Support the "2" flag.  (Tor Perkins)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    552,
 /**/
     551,
 /**/