patch 8.2.3993: when recording a change in Select mode char appears twice

Problem:    When recording a change in Select mode the first typed character
            appears twice.
Solution:   When putting the character back into typeahead remove it from
            recorded characters. (closes #9462)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3993,
 /**/
     3992,
 /**/