[issue12265] revamp argument errors

[Roger Binns]

Roger Binns <python at rogerbinns.com> added the comment:

Is there any reason it doesn't show the function 'prototype' which is by far the most the useful piece of information and is also a form of documentation (plus fairly hard to work out).  Convoluted technospeak is far harder to understand.  Compare:

TypeError: f() takes from 1 to 2 positional arguments but 0 were given

versus:

TypeError: f(a, b=2) takes from 1 to 2 positional arguments but 0 were given

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nosy: +rogerbinns

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