URLPath.__str__() uses __fspath__()

This is because real world usage converts `Path` instances into strings
all the time for passing into other arguments. Prior to this change
this would just point to a non-existent file.

Author: aron

replicate/use.py

@@ -307,7 +307,7 @@ def __fspath__(self) -> str:
         return str(self.__path__)
 
     def __str__(self) -> str:
-        return str(self.__path__)
+        return self.__fspath__()
 
     def __repr__(self) -> str:
         return f"<URLPath url={self.__url__!r} path={self.__path__!r}>"