patch 8.2.0439: :disassemble has minor flaws

Problem:    :disassemble has minor flaws.
Solution:   Format the code.  Use (int) instead of (char) for %c.
            (also by James McCoy, closes #5831)

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    439,
 /**/
     438,
 /**/