fix misleading comment.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57396 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index 44a32db..a259b2a 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -135,7 +135,7 @@
   // We *are* in raw mode.
   LexingRawMode = true;
   
-  // Never keep comments in raw mode.
+  // Default to not keeping comments in raw mode.
   KeepCommentMode = false;
 }