[issue33885] doc Replace "hook function" with "callable" in urllib.request.urlretrieve

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

I am not even sure what a 'hook function' is supposed to mean.  A beginner might think it means something other than any old callable.  Unless Sentil or someone objects within a week, I would merge this.  Ping me if nothing happens.

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nosy: +terry.reedy

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