implement code review changes

changelog/11906.bugfix.rst

@@ -0,0 +1 @@
+Fix regression with :func:`pytest.warns` using custom warning subclasses which have more than one parameter in their `__init__`.

src/_pytest/recwarn.py

@@ -326,6 +326,7 @@ def found_str():
                         category=w.category,
                         filename=w.filename,
                         lineno=w.lineno,
+                        module=w.__module__,
                         source=w.source,
                     )
             # Check warnings has valid argument type (#10865).

testing/test_recwarn.py

@@ -480,6 +480,8 @@ def test_catch_warning_within_raise(self) -> None:
                 raise ValueError("some exception")
 
     def test_multiple_arg_custom_warning(self) -> None:
+        """Test for issue #11906."""
+
         class CustomWarning(UserWarning):
             def __init__(self, a, b):
                 pass