[issue23243] asyncio: emit ResourceWarning warnings if transports/event loops are not explicitly closed

[STINNER Victor]

STINNER Victor added the comment:

I fixed a lot of methods and tests to ensure that all event loops and transports are properly closed. These changes were required to prepare the integration of this change.

Many changed were real bug fixes: closing explicitly tranports on error avoids to leak resources.

Some ResourceWarning are still emited on SSL server tests.

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