fix typos

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@47995 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Analysis/RValues.cpp b/Analysis/RValues.cpp
index 36ea2df..7c1275b 100644
--- a/Analysis/RValues.cpp
+++ b/Analysis/RValues.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-//  This files defines RVal, LVal, and NonLVal, classes that represent
+//  This file defines RVal, LVal, and NonLVal, classes that represent
 //  abstract r-values for use with path-sensitive value tracking.
 //
 //===----------------------------------------------------------------------===//