patch 9.1.0418: Cannot move to previous/next rare word

Problem:  Cannot move to previous/next rare word
          (Colin Kennedy)
Solution: Add the ]r and [r motions (Christ van Willegen)

fixes: #14773
closes: #14780

Signed-off-by: Christ van Willegen - van Noort <github.com@vanwillegen-vannoort.nl>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/insexpand.c b/src/insexpand.c
index 93a56a8..1520d57 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -5195,7 +5195,7 @@
 {
     pos_T	tpos = curwin->w_cursor;
 
-    spell_bad_len = spell_move_to(curwin, BACKWARD, TRUE, TRUE, NULL);
+    spell_bad_len = spell_move_to(curwin, BACKWARD, SMT_ALL, TRUE, NULL);
     if (curwin->w_cursor.col != tpos.col)
 	start_arrow(&tpos);
 }