diff --git a/clang/lib/Driver/ToolChains/Darwin.h b/clang/lib/Driver/ToolChains/Darwin.h
--- a/clang/lib/Driver/ToolChains/Darwin.h
+++ b/clang/lib/Driver/ToolChains/Darwin.h
@@ -19,7 +19,7 @@
 
 namespace clang {
 namespace driver {
-
+// test
 namespace toolchains {
 class MachO;
 } // end namespace toolchains