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/evalfunc.c b/src/evalfunc.c
index fecdc43..cd3a6fd 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -10959,7 +10959,7 @@
     if (argvars[0].v_type == VAR_UNKNOWN)
     {
 	// Find the start and length of the badly spelled word.
-	len = spell_move_to(curwin, FORWARD, TRUE, TRUE, &attr);
+	len = spell_move_to(curwin, FORWARD, SMT_ALL, TRUE, &attr);
 	if (len != 0)
 	{
 	    word = ml_get_cursor();