pydoc: Remove mention of '-g' command line option, document its removal.

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branch : 3.4
remove tautological condition (closes #22954)

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branch : 3.4
extra : rebase_source : 67f80dd29d74f95a81da7930d911cafc4e3ea551
(3.4) Issue22780: reword NotImplemented docs to emphasise should

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branch : 3.4
pydoc: Add a note about setting PAGER to affect console output pagination.

Suggested by James Lowden on docs@.

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branch : 3.4
extra : rebase_source : 9f9fb82bfca893c7e8fcf52819285b687ce39ba0
Issue #22609: Constructors and update methods of mapping classes in the
collections module now accept the self keyword argument.

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branch : 3.4
Issue #22609: Revert changes in UserDict. They conflicted with existing tests.

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branch : 3.4
Issue #21514: The documentation of the json module now refers to new JSON RFC
7159 instead of obsoleted RFC 4627.

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branch : 3.4
Issue #22915: SAX parser now supports files opened with file descriptor or
bytes path.

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branch : 3.4
Issue #22314: pydoc now works when the LINES environment variable is set.

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branch : 3.4
Issue #21280: Fixed a bug in shutil.make_archive() when create an archive of
current directory in current directory.

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branch : 3.4