improve comment.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60718 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseObjc.cpp b/lib/Parse/ParseObjc.cpp
index f937ef1..18ba023 100644
--- a/lib/Parse/ParseObjc.cpp
+++ b/lib/Parse/ParseObjc.cpp
@@ -20,7 +20,7 @@
 using namespace clang;
 
 
-/// ParseExternalDeclaration:
+/// ParseObjCAtDirectives - Handle parts of the external-declaration production:
 ///       external-declaration: [C99 6.9]
 /// [OBJC]  objc-class-definition
 /// [OBJC]  objc-class-declaration