Converting with line_info=False and col_info=True crashed before.

`test_urllib2net.OtherNetworkTests.test_sites_no_connection_close`
used `http://www.imdb.com/` but it is moved to https so the test is
not valid anymore.  Skip test for the moment to allow CI to proceed.

In fact, we now require a newer Sphinx version because APIs have moved around.

This note in documentation was never true.

* Now uses pickle protocol 4

* Doesn't wrap the grammar's `__dict__` in ordered dictionaries anymore as
dictionaries in Python 3.6+ are ordered by default

This still produces deterministic pickles (that hash the same with MD5).
Tested with different PYTHONHASHSEED values.

There's no reason a cookie should _ever_ contain pickled data. That's just asking for a critical security vulnerability. Back in Python2 there were helpers for doing that, but they're no more in Python3. Now coded_value is used when the value needs to be encoded for any reason.

Adds some working and markup fixes that I missed
in the initial commit for this issue.

(Follow-up to GH-6419)

The pydoc CLI assumed -m pydoc would add the empty string
to sys.path, and hence got confused when it switched to
adding the full initial working directory instead.

This refactors the pydoc CLI path manipulation to be
more testable, and ensures it won't accidentally
remove the standard library directory containing
pydoc itself from sys.path.

`MethodType` has the exact semantics that `ExitStack` needs,
so we can avoid creating a Python level closure.

The examples in argparse documentation use `error: too few arguments`
error message which was removed in this commit f97c59aa in 2011.

Executors in concurrent.futures accepted tasks after executor was shutdown by interpreter exit. Tasks were left in PENDING state forever. This fix changes submit to instead raise a RuntimeError.

Based on patch by Oleg Krasnikov.

This code doesn't have effect on the final result, but causes
GCC 8 warnings and can have an undefined behavior.

Large shared arrays allocated using multiprocessing would remain allocated
until the process ends.

The protocol parameter can be any protocol supported by the
pickle module.

When bpo-12015 got resolved by increasing the length of the
random string generated by _RandomNameSequence from six to eight
characters, the docstring of the class was not adjusted accordingly.

* bpo-29613: Added support for SameSite cookies

Implemented as per draft
https://tools.ietf.org/html/draft-west-first-party-cookies-07

* Documented SameSite

And suggestions by members.

* Missing space :(

* Updated News and contributors

* Added version changed details.

* Fix in documentation

* fix in documentation

* Clubbed test cases for same attribute into single.

* Updates

* Style nits + expand tests

* review feedback

* bpo-33201: Modernize "Extension types" doc
* Split tutorial and other topics
* Some small fixes
* Address some review comments
* Rename noddy* to custom* and shoddy to sublist
* Fix markup