ipython/ipython — pull request #2885 by Carreau (2013-02-05 17:12:10+00:00)
Title: get monospace pager back

For whatever reason, pager is not monospaced anymore.
removing those class seem to fix it.

Do anybody have any idea why they where here in the first place ?

Except docstring and `%pycat`, I dont see what could use output_area and output stream in the pager.