gh-121151: Fix wrapping of long usage text of arguments inside a mutually exclusive groups in argparse

[hamdanal]

See the linked issue for the details. The fix here is to not group the arguments in a mutually exclusive group in a single string but to keep them separate so that they can be wrapped if necessary.

• Issue: argparse: usage text of arguments in mutually exclusive groups no longer wraps in Python 3.13 #121151

[ZeroIntensity]

Looks like this patch differs from what the behavior used to be. On older versions, the op3 part looked like:

--op3 [OP3 [OP3 ...]]

But on this patch, it looks like this:

--op3 [OP3 ...] |

[hamdanal]

Looks like this patch differs from what the behavior used to be. On older versions, the op3 part looked like:

--op3 [OP3 [OP3 ...]]

But on this patch, it looks like this:

--op3 [OP3 ...] |

No this was changed in Python 3.9. Which version did you use for testing?

[ZeroIntensity]

Looks like this patch differs from what the behavior used to be. On older versions, the op3 part looked like:

--op3 [OP3 [OP3 ...]]

But on this patch, it looks like this:

--op3 [OP3 ...] |

No this was changed in Python 3.9. Which version did you use for testing?

It might have been 3.8, oops!

[ZeroIntensity]

LGTM, then.

[hamdanal]

@encukou sorry to tag you again but if you could please take a look at this PR it would be great to get it merged before the final release of 3.13 as it fixes a 3.13 regression.

[encukou]

Looks good, thank you!
However, it missed 3.13.0rc1, and we want as few code changes as possible between the release candidate and the final. The backport will need to wait until 3.13.1.

[miss-islington-app]

Thanks @hamdanal for the PR, and @encukou for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[bedevere-app]

GH-122777 is a backport of this pull request to the 3.13 branch.