feat: reintroduce InvalidURL exception class with constructor in _httpx module

python/httpx/_exceptions.py

@@ -36,6 +36,8 @@ from __future__ import annotations
 import contextlib
 import typing
 
+from ._httpx import InvalidURL
+
 if typing.TYPE_CHECKING:
     from ._models import Request, Response  # pragma: no cover
 
@@ -268,15 +270,6 @@ class HTTPStatusError(HTTPError):
         self.response = response
 
 
-class InvalidURL(Exception):
-    """
-    URL is improperly formed or cannot be parsed.
-    """
-
-    def __init__(self, message: str) -> None:
-        super().__init__(message)
-
-
 class CookieConflict(Exception):
     """
     Attempted to lookup a cookie by name, but multiple cookies existed.