Patch by Berker Peksag.

This commit also moves the documentation for the str built-in function to
the new class entry.  Links to :class:`str` now go to the class entry with
the string methods immediately afterwards.

initialization. If the interpreter is shut down and reinitialized (embedded
CPython), the old module dictionary was not dec-refed during the next import of
the time extension module.

Contributed by Torsten Marek of Google.

Issue #12848: The pure Python pickle implementation now treats object lengths as unsigned 32-bit integers, like the C implementation does.
Patch by Serhiy Storchaka.

Issue #12848: The pure Python pickle implementation now treats object lengths as unsigned 32-bit integers, like the C implementation does.
Patch by Serhiy Storchaka.

Patch by Daniel Urban

* Remove example deemed not helpful.
* Simplify the other one.
* Add missing target to ref.

Patch by Serhiy Storchaka.

  (actually, any non-string or non-bytes type).