Tweak comment as suggested by Sebastian.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@114019 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 4e65b9c..f3285ec 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1656,7 +1656,7 @@
 
   const Expr *E = skipTemporaryBindingsAndNoOpCasts(this);
 
-  // pr-values of class type are always temporaries.
+  // Temporaries are by definition pr-values of class type.
   if (!E->Classify(C).isPRValue()) return false;
 
   // Black-list implicit derived-to-base conversions, which are the