[3.10] bpo-45173: Note configparser deprecations will be removed in 3.12 (GH-31084)

Cherry-pick of [`b06e9ba`](python/cpython@b06e9ba) from python/cpython#30952.

Author: hugovk

Lib/configparser.py

@@ -316,7 +316,7 @@ def __init__(self, source=None, filename=None):
     def filename(self):
         """Deprecated, use `source'."""
         warnings.warn(
-            "The 'filename' attribute will be removed in future versions.  "
+            "The 'filename' attribute will be removed in Python 3.12. "
             "Use 'source' instead.",
             DeprecationWarning, stacklevel=2
         )
@@ -326,7 +326,7 @@ def filename(self):
     def filename(self, value):
         """Deprecated, user `source'."""
         warnings.warn(
-            "The 'filename' attribute will be removed in future versions.  "
+            "The 'filename' attribute will be removed in Python 3.12. "
             "Use 'source' instead.",
             DeprecationWarning, stacklevel=2
         )
@@ -757,7 +757,7 @@ def read_dict(self, dictionary, source='<dict>'):
     def readfp(self, fp, filename=None):
         """Deprecated, use read_file instead."""
         warnings.warn(
-            "This method will be removed in future versions.  "
+            "This method will be removed in Python 3.12. "
             "Use 'parser.read_file()' instead.",
             DeprecationWarning, stacklevel=2
         )
@@ -1232,7 +1232,7 @@ def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         warnings.warn(
             "The SafeConfigParser class has been renamed to ConfigParser "
-            "in Python 3.2. This alias will be removed in future versions."
+            "in Python 3.2. This alias will be removed in Python 3.12."
             " Use ConfigParser directly instead.",
             DeprecationWarning, stacklevel=2
         )

Misc/NEWS.d/next/Library/2022-01-27-11-16-59.bpo-45173.wreRF2.rst

@@ -0,0 +1 @@
+Note the configparser deprecations will be removed in Python 3.12.