patch 8.2.0830: Motif: can't map "!"

Problem:    Motif: can't map "!". (Ben Jackson)
Solution:   Remove the shift modifier if it's already included in the key.
            (closes #6147)

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    830,
 /**/
     829,
 /**/