defining the behavior of zip(it, it) (WAS: Converting a flat list...)

[bonono at gmail.com]

Fredrik Lundh wrote:
> maybe it's time to change "equivalent to" to "similar to", to avoid
> messing things up for people who reads the mostly informal library
> reference as if it were an ISO specification.
That is their fault as the library reference is supposed to be "(keep
this under your pillow)", not for reading.