create_subprocess_exec/shell

[Dreamsorcerer]

Not sure if you want to handle this case as well. But, when writing code with asyncio, instead of using the subprocess module, people are likely to use create_subprocess_exec():
https://docs.python.org/3/library/asyncio-subprocess.html#asyncio.create_subprocess_exec

So, maybe should catch those uses as well?

This often uses flags from the subprocess module (e.g. PIPE), so it would also be useful to avoid warnings on the import line if only importing flags (from subprocess import PIPE).