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.

Closes #13905: mention rich-comparison methods in addition to __cmp__ when documenting how to make classes comparable and orderable.

Closes #19179: make table of XML vulnerabilities clearer by using "everyday" booleans and explaining the table beforehand.

compressed streams.

(grafted from e06edc0c7a4951327f0c95ebeebccba6879a6063)

Closes #19178: backport entries for "module" and "package" from 3.x glossary. Patch by Berker Peksag.

Use the platform-independent way of calling a script from the shell: "python prog.py", not "prog.py"

Found by Micheal Wells on docs@.

Patch by Filip Gruszczyński.

Fix order of required StreamReader/StreamWriter base classes.  Spotted by Edward Welbourne on docs@.

Found by Helge Stenström on docs@.