Updated to Clang 3.5a.

Change-Id: I8127eb568f674c2e72635b639a3295381fe8af82
diff --git a/lib/Edit/EditedSource.cpp b/lib/Edit/EditedSource.cpp
index 34b5e62..8fa2ee5 100644
--- a/lib/Edit/EditedSource.cpp
+++ b/lib/Edit/EditedSource.cpp
@@ -72,13 +72,11 @@
     return true;
   }
 
-  Twine concat;
   if (beforePreviousInsertions)
-    concat = Twine(text) + FA.Text;
+    FA.Text = copyString(Twine(text) + FA.Text);
   else
-    concat = Twine(FA.Text) +  text;
+    FA.Text = copyString(Twine(FA.Text) + text);
 
-  FA.Text = copyString(concat);
   return true;
 }