Correct minor grammatical mistake in open() by andresdelfino · Pull Request #15865 · python/cpython

Thanks @andresdelfino for the PR, and @gpshead for merging it 🌮🎉.. I'm working now to backport this PR to: 3.7, 3.8.
🐍🍒⛏🤖

Sorry, @andresdelfino and @gpshead, I could not cleanly backport this to 3.8 due to a conflict.
Please backport using cherry_picker on command line.
cherry_picker 05184515f924c3880067aad87940dd466f751585 3.8

Sorry @andresdelfino and @gpshead, I had trouble checking out the 3.7 backport branch.
Please backport using cherry_picker on command line.
cherry_picker 05184515f924c3880067aad87940dd466f751585 3.7

@gpshead #11314 was not backported to 3.7/3.8. Perhaps this shouldn't either?

I've kickedoff a backport of that to 3.8, once lands i'll bump this one to have our bot do the same.

Thanks @andresdelfino for the PR, and @gpshead for merging it 🌮🎉.. I'm working now to backport this PR to: 3.8.
🐍🍒⛏🤖