Rename F_{None,Text,Append} to OF_{None,Text,Append}. NFC

F_{None,Text,Append} are kept for compatibility since r334221.

llvm-svn: 367800
diff --git a/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl08.rst b/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl08.rst
index b8056c7..a794b46 100644
--- a/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl08.rst
+++ b/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl08.rst
@@ -144,7 +144,7 @@
 
   auto Filename = "output.o";
   std::error_code EC;
-  raw_fd_ostream dest(Filename, EC, sys::fs::F_None);
+  raw_fd_ostream dest(Filename, EC, sys::fs::OF_None);
 
   if (EC) {
     errs() << "Could not open file: " << EC.message();