[pydotorg-www] Typo, two imports on same line on PythonDecoratorLibrary

[Gaëtan Harter]

Hello,

I just wanted to fix a typo in the following example.

    https://wiki.python.org/moin/PythonDecoratorLibrary#Aggregative_decorators_for_generator_functions

The two imports are on the same line instead of two lines.

My account is GaëtanHarter, but anyone else can do this change if you 
prefer.

Regards,
Gaëtan Harter