Fixup merge commit

Author: justinfargnoli

llvm/docs/ReleaseNotes.md

@@ -42,6 +42,11 @@ point (e.g. maybe you would like to give an example of the
 functionality, or simply have a lot to talk about), see the comment below
 for adding a new subsection. -->
 
+* Added a new IRNormalizer pass which aims to transform LLVM modules into
+  a normal form by reordering and renaming instructions while preserving the
+  same semantics. The normalizer makes it easier to spot semantic differences
+  when diffing two modules which have undergone different passes.
+
 * ...
 
 <!-- If you would like to document a larger change, then you can add a