[docs] bug in a documentation exemple

[Eli Bendersky]

> At http://docs.python.org/tutorial/interpreter.html
>
> Every print should be written with parenthesis I think because 'print
> "printtest" ' doesn't work in python 3.0. Print("test") works.
>
> --

Please note that at this point, http://docs.python.org points to the
Python 2.7.x documentation

The latest released Python 3.x docs (currently for 3.2.1) are at
http://docs.python.org/py3k/
Eli