--- a/mercurial/thirdparty/attr/filters.py	Mon Nov 21 16:18:28 2022 -0500
+++ b/mercurial/thirdparty/attr/filters.py	Mon Nov 21 15:04:42 2022 -0500
@@ -1,10 +1,9 @@
+# SPDX-License-Identifier: MIT
+
 """
-Commonly useful filters for :func:`attr.asdict`.
+Commonly useful filters for `attr.asdict`.
 """
 
-from __future__ import absolute_import, division, print_function
-
-from ._compat import isclass
 from ._make import Attribute
 
 
@@ -13,19 +12,19 @@
     Returns a tuple of `frozenset`s of classes and attributes.
     """
     return (
-        frozenset(cls for cls in what if isclass(cls)),
+        frozenset(cls for cls in what if isinstance(cls, type)),
         frozenset(cls for cls in what if isinstance(cls, Attribute)),
     )
 
 
 def include(*what):
-    r"""
-    Whitelist *what*.
+    """
+    Include *what*.
 
-    :param what: What to whitelist.
-    :type what: :class:`list` of :class:`type` or :class:`attr.Attribute`\ s
+    :param what: What to include.
+    :type what: `list` of `type` or `attrs.Attribute`\\ s
 
-    :rtype: :class:`callable`
+    :rtype: `callable`
     """
     cls, attrs = _split_what(what)
 
@@ -36,13 +35,13 @@
 
 
 def exclude(*what):
-    r"""
-    Blacklist *what*.
+    """
+    Exclude *what*.
 
-    :param what: What to blacklist.
-    :type what: :class:`list` of classes or :class:`attr.Attribute`\ s.
+    :param what: What to exclude.
+    :type what: `list` of classes or `attrs.Attribute`\\ s.
 
-    :rtype: :class:`callable`
+    :rtype: `callable`
     """
     cls, attrs = _split_what(what)