Initialize self._ssnd_chunk so that aifc.Error is raised as intended,
not AttributeError.

Dropped the part that says: "For objects that do not provide sequence protocol".

os.dup2() tests for dup3() system call availability at runtime,
but doesn't remember the result across calls, repeating
the test on each call with inheritable=False.

Since the caller of os.dup2() is expected to hold the GIL,
fix this by making the variable holding the test result static.

This function expects the destination buffer size to be given
in wide characters, not bytes.

This adds C versions of methods used by ABCMeta that
improve performance of various ABC operations.

Also, use PYTHON_FOR_REGEN for clinic and blake2s_impl.c rather than PYTHON_FOR_BUILD, and update .travis.yml to make use of the change.

Adapt documentation for `copyright` and `credits` to reality.  Previously, the documentation implied that all each of `copyright`,
`credits`, and `license`, would print a message to call the object in order to see the full text.  In reality, only `license` exhibits this
behaviour, and `copyright` and `credit` print their full text either when printed, displayed, or called.

There was an extra dash in the example for re.sub().

A closing parentheses was missing.
Signed-off-by: Ngie Cooper <yaneurabeya@gmail.com>

Remove pkg_add -r python from FreeBSD installation section.
Moved to OpenBSD.

This note incorrectly stated that "Base64 has an expansion factor of 6
to 4" (it is actually 4 to 3). It was decided to remove the note.

Using the system and place-dependent default encoding for open()
is a bad idea for IDLE's system and location-independent files.

GUI test test_file_buttons() only looks at initial ascii-only lines,
but failed on systems where open() defaults to 'ascii' because
readline() internally reads and decodes far enough ahead to encounter
a non-ascii character in CREDITS.txt.

The PrintNameOffset field of the reparse data buffer
was treated as a number of characters instead of bytes.