Tamás Bence Gedai.

Tamás Bence Gedai.

Revert:
"Always test datetime.strftime("%4Y")

Issue #13305: Always test datetime.datetime.strftime("%4Y") for years < 1900."

In fact, strftime("%4Y") fails on most platforms.

Issue #13305: Always test datetime.datetime.strftime("%4Y") for years < 1900.

Patch by Dmitry Shachnev.

Issue #26323: Add assert_called() and assert_called_once() methods to
unittest.mock.Mock.

Patch by Dmitry Shachnev.

NotImplementedError instead of ImportError.

NotImplementedError instead of ImportError.

multipliers, not final sizes.  Explain y default for .zoom and .subsample.
Initial patch by Serhiy Storchaka.

* add link to PYTHONMALLOCSTATS env var
* add parameters to PyMem macros like PyMem_MALLOC()
* fix PyMem_SetupDebugHooks(): add Calloc functions
* add some newlines for readability

Patch by Tamás Bence Gedai.

Added few missed tests for configure options.

Force clean externals on buildbots.

Force clean of externals on buildbots.

The bufsize parameter is now deprecated and ignored.