[SciPy-dev] change print statements to print functions in docstrings

[Emmanuelle Gouillart]

> At this point in this thread, I've reached the "strong opinion" that I'm +1 w/ Charles: speaking as someone who's gung-ho to make the docstrings as pedagogically useful as possible, I feel code-docstring consistency trumps this - IMO, the docstrings should not be be changed prior to the code itself being changed.

OK, you can revert the changes very easily as I paid attention to save 
versions including only the modifications of print statements.

Emmanuelle