Move the _loop attribute from the constructor of _SelectorTransport,
_ProactorBasePipeTransport and _UnixWritePipeTransport classes to the
constructor of the _FlowControlMixin class.

Add also an assertion to explicit that the parent class must ensure that the
loop is defined (not None)

Move the _loop attribute from the constructor of _SelectorTransport,
_ProactorBasePipeTransport and _UnixWritePipeTransport classes to the
constructor of the _FlowControlMixin class.

Add also an assertion to explicit that the parent class must ensure that the
loop is defined (not None)

MAXPATHLEN is now preferred.

now preferred. Patch written by Jeffrey Armstrong.

When used in the real world it can under some situations trigger
"    assert not _relpath.startswith('..'), "Path must be within the project"
     AssertionError: Path must be within the project
"

Because _get_name_from_path was not expecting to be called with the top level
directory.

We were not honouring load_tests in a package/__init__.py when that was the
start_dir parameter, though we do when it is a child package. The fix required
a little care since it introduces the possibility of infinite recursion.

Patch by Alex Gaynor with some modifications by me.

and above.  Patch by Tim Graham.

and above.  Patch by Tim Graham.

Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff bytes on a 32-bit platform.

Issue #22335: Fix crash when trying to enlarge a bytearray to 0x7fffffff bytes on a 32-bit platform.