patch 7.4.2087

Problem:    Digraph code test coverage is still low.
Solution:   Add more tests. (Christian Brabandt)

src/version.c

@@ -758,6 +758,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2087,
 /**/
     2086,
 /**/