/usr/lib/python2.7/dist-packages/Sphinx-1.1.3.egg-info/requires.txt is in python-sphinx 1.1.3+dfsg-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/Sphinx-1.1.3.egg-info/../../../../share/pyshared/Sphinx-1.1.3.egg-info/requires.txt