limiting the call to readline().  Original patch by Michał
Jastrzębski and Giampaolo Rodola.

Skip tests for 24-bit wave file on big-endian platforms.

module.

documentation.

Suggested by Skip Montanaro on docs@.

for audio modules: aifc, sunau and wave.

Closes #14486: add versionchanged notices throughout the threading docs for PEP8-compliant APIs; the note at the top of the page is too hard to notice.

emulation has changed from 0-based indexing to 1-based like gnu readline.
Original patch by Ronald Oussoren.

failed, second invocation of close() and destructor no more raise an
exception.  Second invocation of close() on sunau writer now has no effects.
The aifc module now accepts lower case of names of the 'ulaw' and 'alaw'
codecs.