Faster 'if char in string' test

[Pierre-Frédéric Caillaud]

> You know, as I was writing stuff like fn(**args.__dict__) yesterday
> (which for me is pretty advanced!), it occurred to me that Python is
> not 'simpler than C'

	In the case of variable number of args, C gives you neither the number of  
arguments, not their types, nor their names, so you have to send the  
number as a parameter or append a null at the end which... sucks !