updated for version 7.3.420

Problem:    "it" and "at" don't work properly with a dash in the tag name.
Solution:   Require a space to match the tag name. (Christian Brabandt)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    420,
 /**/
     419,
 /**/