patch 9.0.1238: :runtime completion can be further improved

Problem:    :runtime completion can be further improved.
Solution:   Also complete the {where} argument values and adjust the
            completion for that. (closes #11874)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1238,
 /**/
     1237,
 /**/