I'm trying to follow the instructions on the wiki to approve changes: https://cwiki.apache.org/confluence/display/ZOOKEEPER/Merging+Github+Pull+Requests
but it does not appear to work. Specifically, this merge script: python zk-merge-pr.py is erroring out with: File "/Library/Python/2.7/site-packages/pbr-2.0.0-py2.7.egg/pbr/version.py", line 25, in <module> import pkg_resources File "build/bdist.macosx-10.12-intel/egg/pkg_resources/__init__.py", line 72, in <module> File "build/bdist.macosx-10.12-intel/egg/packaging/requirements.py", line 59, in <module> TypeError: __call__() takes exactly 2 arguments (1 given) Any ideas? C