Check for 'exact' type before performing the replace on .save
Check for 'exact' type before performing the replace on .save

It's better to keep `from_url_without_rest` as None instead of `''`
for non-Exact Redirect type.

rtfd/readthedocs.org,rtfd/readthedocs.org,rtfd/readthedocs.org,rtfd/readthedocs.org