/usr/lib/python2.7/dist-packages/docutils/math/latex2mathml.py is in python-docutils 0.8.1-4ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/docutils/math/../../../../../share/pyshared/docutils/math/latex2mathml.py