Also collapse redundant versionadded/versionchanged markup in
poplib.stls entry.

In issue 20074 it was pointed out that getpass would fail with a traceback if
stdin was, for example /dev/null, which is a non-unlikely scenario.

Also backported the tests from issue 17484 as modified by issue 18116.

(What I really did was copy getpass.py and test_getpass.py from their
state on tip as of 17bd04fbf3d3).

calculated.  Generalized support of the euro modifier.

Clarified the "At the moment" wording, and added the get_stats entry in the
module summary that Serhiy noted was missing at the end of issue 16351.

Given that pydoc lists all the function docstrings, I'm not sure that module
summary section is actually needed; but, it is probably better to address that
when the module is converted to use Argument Clinic.  In the meantime we
should keep the list complete.

  enabled.

disabled since 3.0 due to the changes in listcomp handling.

disabled since 3.0 due to the changes in listcomp handling.

Also added versionadded for for fish/csh, fixed indentation of versionadded
for ElementTree.write, and make the behavior of shelf as a context manager
explicit in the docs.

methods.

methods.

Also move tick_counter from deprecated section to removed section.

Despite Serhiy's suggestion in issue18529, the emdash just looks
too long to me, at least in my browser.  This usage case is sort
of halfway between endash (connective) and emdash (pause/separator).

This arrangement means the sections that have summaries come
first, and everything else comes after those.