PEP 554 (text) updates

[ericsnowcurrently]

A few things have changed since the last time the PEP was updated:

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[dimitern]

A minor typo I found here: https://www.python.org/dev/peps/pep-0554/#passing-objects-via-marshal
Not sure a comment is the proper way to report this - it's minor anyway.

interp = interpreters.create()
r, s = interpreters.create_fifo()

should most likely be:

interp = interpreters.create()
r, s = interpreters.create_channel()

Happy to file an issue if would be helpful, or even PR if appropriate.

[ericsnowcurrently]

Hey @dimitern! Yeah, an issue and PR would be great! Both should be made against the https://github.com/python/peps repo.

[ericsnowcurrently]

Please @-mention me on the issue you create.