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/testdir/Make_all.mak b/src/testdir/Make_all.mak
index b41f5f4..a80b130 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -278,6 +278,7 @@
 	test_spell \
 	test_spell_utf8 \
 	test_spellfile \
+	test_spellrare \
 	test_startup \
 	test_startup_utf8 \
 	test_stat \
@@ -521,6 +522,7 @@
 	test_spell.res \
 	test_spell_utf8.res \
 	test_spellfile.res \
+	test_spellrare.res \
 	test_startup.res \
 	test_stat.res \
 	test_statusline.res \