Hi,

Whilst working on the Reproducible Builds effort [0], we noticed that
powerline could not be built reproducibly.

This is because the documentation embedded the contents of os.environ
by automatically documenting the Renderer class from the powerline's
renderer module.

A patch is attached that specifically excludes documenting this class
member (only) from the documentation.

 [0] https://reproducible-builds.org/


Regards,