pycompat: alias urlreq.unquote to unquote_to_bytes Previously, urlreq.unquote aliased to urllib.parse.unquote, which returned a str/unicode. We like bytes, so switch urlreq.unquote to dispatch to urllib.parse.unquote_to_bytes. This required a minor helper function to register an alias under a different name from which it points. If this turns into a common pattern, we could likely teach _registeralias to accept tuple values defining the mapping. Until then, I didn't feel like adding complexity to _registeralias.