updated for version 7.4b.020

Problem:    "g~ap" changes first character of next paragraph. (Manuel Ortega)
Solution:   Avoid subtracting (0 - 1) from todo.  (Mike Williams)

src/version.c

@@ -727,6 +727,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    20,
 /**/
     19,
 /**/