Only the filename is still a PyString now.
(We'll need to deal with the default filesystem encoding to do it right.)

to guarantee the claim that it doesn't set an exception.

object with PyString calls and not checking errors.  This caused the display
of syntax errors to be deformed.

Caused file save to fail. Bug 1130.

M    idlelib/IOBinding.py
M    idlelib/NEWS.txt

Changes comparisons between PyBytes and PyUnicode to return unequal
instead of raising TypeError.

locally-defined macros that assume ASCII and only consider ASCII letters.

the range of 255 instead of only 128.

This will undoubtedly require Windows build file changes too.

Get rid of buffer().  Use memoryview() in its place where possible.
In a few places, do things a bit different, because memoryview()
can't slice (yet).

without being initialized.  Also make the code conform to the comment and
return the new object.  This code needs a test!

str.join(...) now applies str() to the sequence elements if they're
not strings alraedy, except for bytes, which still raise TypeError
(for the same reasons why ""==b"" raises it).

tutorial is the right place to mention a file object's encoding.

PyBuffer into Py_buffer.

mostly got the distinction between text and binary modes correct, though
someone should proofread my writing.  I also sort of guessed at the meaning
of the various index:: entries.

for a bit of rewriting.  Separating the reformatting from the rewriting
should make it easier for people to review the substantive changes.

Change PyBuffer to Py_buffer to be consistent with other non-object structures like Py_complex.  Add some more functionality to the memoryview object.