updated for version 7.3.681

Problem:    List of distributed files picks up backup files.
Solution:   Make tutor patterns more specific.

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    681,
 /**/
     680,
 /**/