patch 8.2.2046: some test failures don't give a clear error

Problem:    Some test failures don't give a clear error.
Solution:   Use assert_match() and assert_fails() instead of assert_true().
            (Ken Takata, closes #7368)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2046,
 /**/
     2045,
 /**/