ReleaseNotes: note Sphinx migration.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172955 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
index bc23185..e8ea5c9 100644
--- a/docs/ReleaseNotes.rst
+++ b/docs/ReleaseNotes.rst
@@ -47,6 +47,11 @@
archives) have been removed. Any existing clients of these features should
move to using a linker with integrated LTO support.
+* LLVM and Clang's documentation has been migrated to the `Sphinx
+ <http://sphinx-doc.org/>`_ documentation generation system which uses
+ easy-to-write reStructuredText. See `llvm/docs/README.txt` for more
+ information.
+
* ... next change ...
.. NOTE