when called with a timeout.  Patch by Arnaud Ysmal.

Issue #13237: Fix formatting error - the legacy shell commands weren't meant to be under the Notes heading

Issue #13237: Forward port subprocess module updates and explicitly document UTF-8 encoding assumption when universal_newlines=True

Issue #13340.

Issue #10570

error handler in interactive mode (when calling into PyOS_Readline()).

Closes #13340.

The find utility of OpenBSD doesn't support the "-exec cmd {} +"
action. Change it to use "-depth -exec cmd {} ;" instead.

Also, remove __pycache__ before *.py[co], as most bytecode files are
in __pycache__ directories. Only those generated by Python 2 under
Doc/tools are not.

Closes #13326.

Closes #13254.

variable in the default value of a keyword-only argument:
(lambda *, arg=GLOBAL_NAME: None)

Thanks to Robert Xiao.

Unicode string.

This is an incompatible change, but putp() is used to emit terminfo commands,
which are bytes strings, not Unicode strings.