[3.13] gh-95844: Move help_url code to a help module function (GH-129971) (#138485)

gh-95844: Move help_url code to a help module function (GH-129971)

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(cherry picked from commit 3b4cd885634abc029b409cb566e8d9a530d061f8)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>