MERGE: #16112: platform.architecture does not correctly escape argument to /usr/bin/file. Fix original patch

#16112: platform.architecture does not correctly escape argument to /usr/bin/file. Fix original patch

#16112: platform.architecture does not correctly escape argument to /usr/bin/file. Use 'communicate()' and decode the bytes

This error cannot occur in practice: PyUnicode_FromObject() always return
a "ready" string.

Thanks to Roger Serwy for patch.

Thanks to Roger Serwy for patch.

Issue #16089: Allow ElementTree.TreeBuilder to work again with a non-Element element_factory (fixes a regression in SimpleTAL).

Issue #12947: Better workaround for the problem with doctest directives being stripped from code examples that are intended to illustrate those directives

gil_interval == 1 in extreme situations.

Patch by Serhiy Storchaka.