fix typos

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@47995 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Analysis/CFRefCount.cpp b/Analysis/CFRefCount.cpp
index 188ce70..fce9b44 100644
--- a/Analysis/CFRefCount.cpp
+++ b/Analysis/CFRefCount.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-//  This files defines the methods for CFRefCount, which implements
+//  This file defines the methods for CFRefCount, which implements
 //  a reference count checker for Core Foundation (Mac OS X).
 //
 //===----------------------------------------------------------------------===//