Fix typing information for the pprint module

There is more type information that could be added. We can add those
later to make it easier, this is jsut the minimum to allow linting to
pass

src/_pytest/_io/pprint.py

@@ -2,9 +2,6 @@
 # (https://github.com/python/cpython/) at commit
 # c5140945c723ae6c4b7ee81ff720ac8ea4b52cfd (python3.12).
 #
-# flake8: noqa
-# type: ignore
-#
 #
 #  Original Author:      Fred L. Drake, Jr.
 #                        fdrake@acm.org
@@ -21,6 +18,11 @@ import re
 import sys as _sys
 import types as _types
 from io import StringIO as _StringIO
+from typing import Any
+from typing import Callable
+from typing import Dict
+from typing import IO
+from typing import List
 
 
 class _safe_key:
@@ -49,7 +51,7 @@ class _safe_key:
 
 
 def _safe_tuple(t):
-    "Helper function for comparing 2-tuples"
+    """Helper function for comparing 2-tuples"""
     return _safe_key(t[0]), _safe_key(t[1])
 
 
@@ -107,7 +109,7 @@ class PrettyPrinter:
         self._sort_dicts = sort_dicts
         self._underscore_numbers = underscore_numbers
 
-    def pformat(self, object):
+    def pformat(self, object: Any) -> str:
         sio = _StringIO()
         self._format(object, sio, 0, 0, {}, 0)
         return sio.getvalue()
@@ -157,7 +159,10 @@ class PrettyPrinter:
         self._format_namespace_items(items, stream, indent, allowance, context, level)
         stream.write(")")
 
-    _dispatch = {}
+    _dispatch: Dict[
+        Callable[..., str],
+        Callable[["PrettyPrinter", Any, IO[str], int, int, Dict[int, int], int], str],
+    ] = {}
 
     def _pprint_dict(self, object, stream, indent, allowance, context, level):
         write = stream.write
@@ -544,7 +549,7 @@ class PrettyPrinter:
             context[objid] = 1
             readable = True
             recursive = False
-            components = []
+            components: List[str] = []
             append = components.append
             level += 1
             if self._sort_dicts:

src/_pytest/_io/saferepr.py

@@ -5,7 +5,7 @@ from typing import Dict
 from typing import IO
 from typing import Optional
 
-from .pprint import PrettyPrinter  # type: ignore
+from .pprint import PrettyPrinter
 
 
 def _try_repr_or_str(obj: object) -> str:
@@ -148,13 +148,11 @@ class AlwaysDispatchingPrettyPrinter(PrettyPrinter):
         context: Dict[int, Any],
         level: int,
     ) -> None:
-        # Type ignored because _dispatch is private.
-        p = self._dispatch.get(type(object).__repr__, None)  # type: ignore[attr-defined]
+        p = self._dispatch.get(type(object).__repr__, None)
 
         objid = id(object)
         if objid in context or p is None:
-            # Type ignored because _format is private.
-            super()._format(  # type: ignore[misc]
+            super()._format(
                 object,
                 stream,
                 indent,
@@ -177,6 +175,6 @@ def _pformat_dispatch(
     *,
     compact: bool = False,
 ) -> str:
-    return AlwaysDispatchingPrettyPrinter(  # type: ignore
+    return AlwaysDispatchingPrettyPrinter(
         indent=indent, width=width, depth=depth, compact=compact
     ).pformat(object)