patch 9.1.0232: Conceal test fails when rightleft feature is disabled

Problem:  Conceal test fails when rightleft feature is disabled.
Solution: Skip test if rightleft feature is missing (Julio B).

closes: #14342

Signed-off-by: Julio B <julio.bacel@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_conceal.vim

@@ -199,6 +199,7 @@ endfunc
 
 " Same as Test_conceal_wrapped_cursorline_wincolor(), but with 'rightleft'.
 func Test_conceal_wrapped_cursorline_wincolor_rightleft()
+  CheckFeature rightleft
   CheckScreendump
 
   let code =<< trim [CODE]

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    232,
 /**/
     231,
 /**/