Closed
Description
While running mplot3d tests, I get that numpy FutureWarning about comparing against None, but this time in backend_pdf!
/home/ben/.local/lib/python2.7/site-packages/matplotlib-1.4.x-py2.7-linux-x86_64.egg/matplotlib/backends/backend_pdf.py:2277: FutureWarning: comparison to `None` will result in an elementwise object comparison in the future.
different = bool(ours != theirs)