sympy/sympy — pull request #970 by Habel (2012-01-14 06:00:38+00:00)
Title: Doctest/strings for interactive

http://www.google-melange.com/gci/task/view/google/gci2011/7234267

For that task. I basically made all functions defined within other functions private and documented all the parameters of init_session and init_printing, the two major functions in this module.