Implement query/params in URL string coercion

Currently, if you `print` a `URL` object, you get something like https://example.com/example.html . However, many request URLs include query strings and parameters like e.g. https://example.com/example.html?querystring¶m=val . In general, this information _should_ exist when the URL is created, all that needs to be done is some printing logic in `URL.__str__` (defined as `URLtoString`).

Locate the URLtoString method that implements URL.__str__ and inspect how the URL's query and parameter data is stored when the object is created. Confirm the current printed form, then make the completed string include that existing query information, using the example in the issue to verify the result.

Written by the indexing model from the issue text.