Multi-line lambda proposal.

[yairchu at gmail.com]

multi-line lambdas, had it been added to python a long time ago, would
had reduced a lot of complexity in the language.
for example - with multi-line lambdas - decorators are unneccesary.
just give the multi-line lambda as an argument to a function - no need
for special syntax..
the alternative decorators would also be simpler.
currently when you want to create a "decorator-that-accepts-additional-
arguments" you gotta make a funtion that gets those
additional-arguments and returns a function that will be the decorator.