Update whatsnew file
@@ -6,6 +6,14 @@ This section features and improvements of note in each release.
The full release history can be viewed `at the GitHub yank releases page <https://github.com/choderalab/yank/releases>`_.
+Development
+-----------
+
+Bugfixes
+""""""""
+- Fix bug #1012 when determining automatically the ``group_size`` of replica exchange simulations with MPI (`#1073 <https://github.com/choderalab/yank/pull/1073>`_).
+
+
0.23.3 Adds support for single mutations using Modeller
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- Adds an optional ``modeller` directive to the ``molecules`` section of the YAML file
