this is really just a recommendation, not a requirement.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69416 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/c90.c b/test/Preprocessor/c90.c
index 4287d0d..ed63d1b 100644
--- a/test/Preprocessor/c90.c
+++ b/test/Preprocessor/c90.c
@@ -4,7 +4,7 @@
/* PR3919 */
#define foo`bar /* expected-error {{whitespace required after macro name}} */
-#define foo2!bar /* expected-warning {{whitespace required after macro name}} */
+#define foo2!bar /* expected-warning {{whitespace recommended after macro name}} */
#define foo3$bar /* expected-error {{'$' in identifier}} */