bpo-40204: Add :noindex: in the documentation (GH-21859)

Add :noindex: to duplicated documentation to fix "duplicate object
description" errors.

For example, fix this Sphinx 3 issue:

Doc/library/configparser.rst:1146: WARNING: duplicate object
description of configparser.ConfigParser.optionxform, other instance
in library/configparser, use :noindex: for one of them

9 files changed, 94 insertions, 81 deletions

diff --git a/Doc/library/aifc.rst b/Doc/library/aifc.rst
index 7328907..2e917cf 100644
--- a/Doc/library/aifc.rst
+++ b/Doc/library/aifc.rst
@@ -208,6 +208,7 @@ number of frames must be filled in.
 
 
 .. method:: aifc.tell()
+   :noindex:
 
    Return the current write position in the output file.  Useful in combination
    with :meth:`setmark`.
@@ -232,6 +233,7 @@ number of frames must be filled in.
 
 
 .. method:: aifc.close()
+   :noindex:
 
    Close the AIFF file.  The header of the file is updated to reflect the actual
    size of the audio data. After calling this method, the object can no longer be
diff --git a/Doc/library/configparser.rst b/Doc/library/configparser.rst
index 739477f..2e22a54 100644
--- a/Doc/library/configparser.rst
+++ b/Doc/library/configparser.rst
@@ -674,97 +674,98 @@ be overridden by subclasses or by attribute assignment.
 
 .. attribute:: ConfigParser.BOOLEAN_STATES
 
-  By default when using :meth:`~ConfigParser.getboolean`, config parsers
-  consider the following values ``True``: ``'1'``, ``'yes'``, ``'true'``,
-  ``'on'`` and the following values ``False``: ``'0'``, ``'no'``, ``'false'``,
-  ``'off'``.  You can override this by specifying a custom dictionary of strings
-  and their Boolean outcomes. For example:
-
-  .. doctest::
-
-     >>> custom = configparser.ConfigParser()
-     >>> custom['section1'] = {'funky': 'nope'}
-     >>> custom['section1'].getboolean('funky')
-     Traceback (most recent call last):
-     ...
-     ValueError: Not a boolean: nope
-     >>> custom.BOOLEAN_STATES = {'sure': True, 'nope': False}
-     >>> custom['section1'].getboolean('funky')
-     False
-
-  Other typical Boolean pairs include ``accept``/``reject`` or
-  ``enabled``/``disabled``.
+   By default when using :meth:`~ConfigParser.getboolean`, config parsers
+   consider the following values ``True``: ``'1'``, ``'yes'``, ``'true'``,
+   ``'on'`` and the following values ``False``: ``'0'``, ``'no'``, ``'false'``,
+   ``'off'``.  You can override this by specifying a custom dictionary of strings
+   and their Boolean outcomes. For example:
+
+   .. doctest::
+
+      >>> custom = configparser.ConfigParser()
+      >>> custom['section1'] = {'funky': 'nope'}
+      >>> custom['section1'].getboolean('funky')
+      Traceback (most recent call last):
+      ...
+      ValueError: Not a boolean: nope
+      >>> custom.BOOLEAN_STATES = {'sure': True, 'nope': False}
+      >>> custom['section1'].getboolean('funky')
+      False
+
+   Other typical Boolean pairs include ``accept``/``reject`` or
+   ``enabled``/``disabled``.
 
 .. method:: ConfigParser.optionxform(option)
+   :noindex:
 
-  This method transforms option names on every read, get, or set
-  operation.  The default converts the name to lowercase.  This also
-  means that when a configuration file gets written, all keys will be
-  lowercase.  Override this method if that's unsuitable.
-  For example:
+   This method transforms option names on every read, get, or set
+   operation.  The default converts the name to lowercase.  This also
+   means that when a configuration file gets written, all keys will be
+   lowercase.  Override this method if that's unsuitable.
+   For example:
 
-  .. doctest::
+   .. doctest::
+
+      >>> config = """
+      ... [Section1]
+      ... Key = Value
+      ...
+      ... [Section2]
+      ... AnotherKey = Value
+      ... """
+      >>> typical = configparser.ConfigParser()
+      >>> typical.read_string(config)
+      >>> list(typical['Section1'].keys())
+      ['key']
+      >>> list(typical['Section2'].keys())
+      ['anotherkey']
+      >>> custom = configparser.RawConfigParser()
+      >>> custom.optionxform = lambda option: option
+      >>> custom.read_string(config)
+      >>> list(custom['Section1'].keys())
+      ['Key']
+      >>> list(custom['Section2'].keys())
+      ['AnotherKey']
 
-     >>> config = """
-     ... [Section1]
-     ... Key = Value
-     ...
-     ... [Section2]
-     ... AnotherKey = Value
-     ... """
-     >>> typical = configparser.ConfigParser()
-     >>> typical.read_string(config)
-     >>> list(typical['Section1'].keys())
-     ['key']
-     >>> list(typical['Section2'].keys())
-     ['anotherkey']
-     >>> custom = configparser.RawConfigParser()
-     >>> custom.optionxform = lambda option: option
-     >>> custom.read_string(config)
-     >>> list(custom['Section1'].keys())
-     ['Key']
-     >>> list(custom['Section2'].keys())
-     ['AnotherKey']
-
-  .. note::
-     The optionxform function transforms option names to a canonical form.
-     This should be an idempotent function: if the name is already in
-     canonical form, it should be returned unchanged.
+   .. note::
+      The optionxform function transforms option names to a canonical form.
+      This should be an idempotent function: if the name is already in
+      canonical form, it should be returned unchanged.
 
 
 .. attribute:: ConfigParser.SECTCRE
 
-  A compiled regular expression used to parse section headers.  The default
-  matches ``[section]`` to the name ``"section"``.  Whitespace is considered
-  part of the section name, thus ``[  larch  ]`` will be read as a section of
-  name ``"  larch  "``.  Override this attribute if that's unsuitable.  For
-  example:
+   A compiled regular expression used to parse section headers.  The default
+   matches ``[section]`` to the name ``"section"``.  Whitespace is considered
+   part of the section name, thus ``[  larch  ]`` will be read as a section of
+   name ``"  larch  "``.  Override this attribute if that's unsuitable.  For
+   example:
+
+   .. doctest::
+
+      >>> import re
+      >>> config = """
+      ... [Section 1]
+      ... option = value
+      ...
+      ... [  Section 2  ]
+      ... another = val
+      ... """
+      >>> typical = configparser.ConfigParser()
+      >>> typical.read_string(config)
+      >>> typical.sections()
+      ['Section 1', '  Section 2  ']
+      >>> custom = configparser.ConfigParser()
+      >>> custom.SECTCRE = re.compile(r"\[ *(?P<header>[^]]+?) *\]")
+      >>> custom.read_string(config)
+      >>> custom.sections()
+      ['Section 1', 'Section 2']
 
-  .. doctest::
+   .. note::
 
-     >>> import re
-     >>> config = """
-     ... [Section 1]
-     ... option = value
-     ...
-     ... [  Section 2  ]
-     ... another = val
-     ... """
-     >>> typical = configparser.ConfigParser()
-     >>> typical.read_string(config)
-     >>> typical.sections()
-     ['Section 1', '  Section 2  ']
-     >>> custom = configparser.ConfigParser()
-     >>> custom.SECTCRE = re.compile(r"\[ *(?P<header>[^]]+?) *\]")
-     >>> custom.read_string(config)
-     >>> custom.sections()
-     ['Section 1', 'Section 2']
-
-  .. note::
-
-     While ConfigParser objects also use an ``OPTCRE`` attribute for recognizing
-     option lines, it's not recommended to override it because that would
-     interfere with constructor options *allow_no_value* and *delimiters*.
+      While ConfigParser objects also use an ``OPTCRE`` attribute for recognizing
+      option lines, it's not recommended to override it because that would
+      interfere with constructor options *allow_no_value* and *delimiters*.
 
 
 Legacy API Examples
diff --git a/Doc/library/difflib.rst b/Doc/library/difflib.rst
index 7a898c2..25e3511 100644
--- a/Doc/library/difflib.rst
+++ b/Doc/library/difflib.rst
@@ -24,6 +24,7 @@ diffs. For comparing directories and files, see also, the :mod:`filecmp` module.
 
 
 .. class:: SequenceMatcher
+   :noindex:
 
    This is a flexible class for comparing pairs of sequences of any type, so long
    as the sequence elements are :term:`hashable`.  The basic algorithm predates, and is a
@@ -651,6 +652,7 @@ The :class:`Differ` class has this constructor:
 
 
 .. class:: Differ(linejunk=None, charjunk=None)
+   :noindex:
 
    Optional keyword parameters *linejunk* and *charjunk* are for filter functions
    (or ``None``):
diff --git a/Doc/library/enum.rst b/Doc/library/enum.rst
index b327a0a..00bfb26 100644
--- a/Doc/library/enum.rst
+++ b/Doc/library/enum.rst
@@ -50,6 +50,7 @@ helper, :class:`auto`.
     the bitwise operations without losing their :class:`Flag` membership.
 
 .. function:: unique
+   :noindex:
 
     Enum class decorator that ensures only one name is bound to any one value.
 
diff --git a/Doc/library/socket.rst b/Doc/library/socket.rst
index d798c1a..5bcac20 100755
--- a/Doc/library/socket.rst
+++ b/Doc/library/socket.rst
@@ -1695,7 +1695,9 @@ to sockets.
 
 .. method:: socket.setsockopt(level, optname, value: int)
 .. method:: socket.setsockopt(level, optname, value: buffer)
+   :noindex:
 .. method:: socket.setsockopt(level, optname, None, optlen: int)
+   :noindex:
 
    .. index:: module: struct
 
diff --git a/Doc/library/tarfile.rst b/Doc/library/tarfile.rst
index c204263..cca466b 100644
--- a/Doc/library/tarfile.rst
+++ b/Doc/library/tarfile.rst
@@ -151,6 +151,7 @@ Some facts and figures:
 
 
 .. class:: TarFile
+   :noindex:
 
    Class for reading and writing tar archives. Do not use this class directly:
    use :func:`tarfile.open` instead. See :ref:`tarfile-objects`.
diff --git a/Doc/library/token.rst b/Doc/library/token.rst
index f8ebb27..a1aceba 100644
--- a/Doc/library/token.rst
+++ b/Doc/library/token.rst
@@ -70,6 +70,7 @@ the :mod:`tokenize` module.
 
 
 .. data:: TYPE_COMMENT
+   :noindex:
 
    Token value indicating that a type comment was recognized.  Such
    tokens are only produced when :func:`ast.parse()` is invoked with
diff --git a/Doc/library/turtle.rst b/Doc/library/turtle.rst
index fed8504..d348753 100644
--- a/Doc/library/turtle.rst
+++ b/Doc/library/turtle.rst
@@ -1069,6 +1069,7 @@ More drawing control
 ~~~~~~~~~~~~~~~~~~~~
 
 .. function:: reset()
+   :noindex:
 
    Delete the turtle's drawings from the screen, re-center the turtle and set
    variables to the default values.
@@ -1090,6 +1091,7 @@ More drawing control
 
 
 .. function:: clear()
+   :noindex:
 
    Delete the turtle's drawings from the screen.  Do not move turtle.  State and
    position of the turtle as well as drawings of other turtles are not affected.
@@ -1362,6 +1364,7 @@ Using events
 ------------
 
 .. function:: onclick(fun, btn=1, add=None)
+   :noindex:
 
    :param fun: a function with two arguments which will be called with the
                coordinates of the clicked point on the canvas
diff --git a/Doc/library/urllib.request.rst b/Doc/library/urllib.request.rst
index 288ce14..b37f230 100644
--- a/Doc/library/urllib.request.rst
+++ b/Doc/library/urllib.request.rst
@@ -946,7 +946,7 @@ tracking URIs for which authentication credentials should always be sent.
    If *is_authenticated* is specified as ``True``, *realm* is ignored.
 
 
-.. method:: HTTPPasswordMgr.find_user_password(realm, authuri)
+.. method:: HTTPPasswordMgrWithPriorAuth.find_user_password(realm, authuri)
 
    Same as for :class:`HTTPPasswordMgrWithDefaultRealm` objects