Index: docs/ReleaseNotes.rst
===================================================================
--- docs/ReleaseNotes.rst
+++ docs/ReleaseNotes.rst
@@ -89,6 +89,10 @@
   Warns about the performance overhead arising from concatenating strings using
   the ``operator+``, instead of ``operator+=``.
 
+- `readability-container-size-empty
+  <http://clang.llvm.org/extra/clang-tidy/checks/readability-container-size-empty.html>`_ check
+  supports arbitrary containers with ``empty()`` and ``size()`` methods.
+
 - New `readability-misplaced-array-index
   <http://clang.llvm.org/extra/clang-tidy/checks/readability-misplaced-array-index.html>`_ check