Bug report

Bug description:

This is to wait for#55531 /#136643

• This function accepts bytes since98297ee. This is however undocumented, and untested. I propose deprecating (& later removing) it, otherwise it should be documented and tested properly.

• This function is documented as

  encoding should be ASCII only.

  However, this is only enforced for bytes (see point 1) with aValueError, and for strings the characters are simply removed. We should be consistent and not depend on input type. I propose enforcing this for strings too with aValueError.

cc@malemburg (Note, absolutely no rush for this one, we should get the performance issue/C implementation sorted out first :-)

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response