revert the changes done for issue14826 - quoting witin Request is not desirable.

Lib/urllib/request.py

@@ -264,7 +264,6 @@ class Request:
                  method=None):
         # unwrap('<URL:type://host/path>') --> 'type://host/path'
         self.full_url = unwrap(url)
-        self.full_url = quote(self.full_url, safe="%/:=&?~#+!$,;'@()*[]|")
         self.full_url, self.fragment = splittag(self.full_url)
         self.data = data
         self.headers = {}