[issue37751] In codecs, function 'normalizestring' should convert both spaces and hyphens to underscores.

[akdor1154]

akdor1154 <akdor1154 at gmail.com> added the comment:

If I understand the target of this issue, this is a breaking change in python 3.9 .

E.g. see https://github.com/SAP/PyHDB/issues/149

Ideally if we did not intend to break libraries then can this be fixed?
Or if it is acceptable to have such a breaking change, can it be documented as such? (maybe this is https://github.com/python/cpython/pull/23096 ? though I would not interpret that as a breaking change at first glance)

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nosy: +akdor1154

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