[Doc parsing] Provide diagnostics for unknown documentation 
commands. // rdar://12381408


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181071 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/AST/CommentLexer.cpp b/unittests/AST/CommentLexer.cpp
index 507daf8..fc0fd77 100644
--- a/unittests/AST/CommentLexer.cpp
+++ b/unittests/AST/CommentLexer.cpp
@@ -64,7 +64,7 @@
   FileID File = SourceMgr.createFileIDForMemBuffer(Buf);
   SourceLocation Begin = SourceMgr.getLocForStartOfFile(File);
 
-  Lexer L(Allocator, Traits, Begin, Source, Source + strlen(Source));
+  Lexer L(Allocator, Diags, Traits, Begin, Source, Source + strlen(Source));
 
   while (1) {
     Token Tok;