Revert 'Fix a typo 'iff' => 'if''. iff is an abreviation of if and only if. See: http://en.wikipedia.org/wiki/If_and_only_if Commit 164767

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164768 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/WinCOFFObjectWriter.cpp b/lib/MC/WinCOFFObjectWriter.cpp
index a2a9825..f706cac 100644
--- a/lib/MC/WinCOFFObjectWriter.cpp
+++ b/lib/MC/WinCOFFObjectWriter.cpp
@@ -289,7 +289,7 @@
   return Data.size();
 }
 
-/// Add String to the table if it is not already there.
+/// Add String to the table iff it is not already there.
 /// @returns the index into the string table where the string is now located.
 size_t StringTable::insert(llvm::StringRef String) {
   map::iterator i = Map.find(String);