asyncio Event Loop does not provide warning about keeping a reference to returned task

Documentation

The high level asyncio documentation warns that one should save the result of asyncio.create_task as the event loop only keeps weak references to tasks.
This same warning is not seen in the low level Event Loop documentation even though the same rules apply. The example code snippets also do not save a reference which would lead readers to believe it is safe to discard the result of the EventLoop.create_task function when it is not.

Relevant function in the high level documentation: https://docs.python.org/3/library/asyncio-task.html#asyncio.create_task

Relevant function in the low level documentation: https://docs.python.org/3/library/asyncio-eventloop.html#asyncio.loop.create_task

Linked PRs

• gh-155599

将 asyncio.create_task 的文档与两个链接的文档 URL 中的 asyncio.loop.create_task 部分进行比较。更新低级警告及其示例，使其反映高级文档中关于引用生命周期的指导，然后验证两个部分是否一致。