patch 8.0.0763: libvterm can be improved

Problem:    Libvterm can be improved.
Solution:   Various small improvements, more comments.

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    763,
 /**/
     762,
 /**/