CI latest ipython broke typing

[MarcoGorelli]

mypy.....................................................................Failed
- hook id: mypy
- duration: 180.87s
- exit code: 1

pandas/io/formats/printing.py:264: error: Incompatible types in assignment (expression has type "str", base class "BaseFormatter" defined the type as "ObjectName")  [assignment]
pandas/io/formats/printing.py:265: error: Incompatible types in assignment (expression has type "Tuple[Type[Dict[Any, Any]]]", base class "BaseFormatter" defined the type as "Type[str]")  [assignment]
pandas/tests/test_register_accessor.py:16: note: By default the bodies of untyped functions are not checked, consider using --check-untyped-defs  [annotation-unchecked]
pandas/tests/io/xml/test_xml.py:1118: note: By default the bodies of untyped functions are not checked, consider using --check-untyped-defs  [annotation-unchecked]
pandas/tests/io/xml/test_xml.py:1297: note: By default the bodies of untyped functions are not checked, consider using --check-untyped-defs  [annotation-unchecked]
pandas/tests/io/xml/test_to_xml.py:995: note: By default the bodies of untyped functions are not checked, consider using --check-untyped-defs  [annotation-unchecked]
Found 2 errors in 1 file (checked 1396 source files)