BUG: Silence Period[B] warnings in plotting code

[torext]

• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.
• Added type annotations to new arguments/methods/functions.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

This silences warnings introduced by #53446 that would happen during normal plotting activity.

[torext]

Anything else I can do here to get this merged?

[mroeschke]

Thanks. Could you add a whatsnew note to 2.1.2.rst?

[torext]

Thanks. Could you add a whatsnew note to 2.1.2.rst?

Sure thing, @mroeschke, that's done now. Admittedly not completely sure I respected the style of both the entry and the corresponding commit message correctly, apologies in advance if it's not the case!

[mroeschke]

Thanks @torext

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 2.1.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 6e6a6831aaa2d1606aa897b34f106e655180034b

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #55138: BUG: Silence `Period[B]` warnings in plotting code'

4. Push to a named branch:

git push YOURFORK 2.1.x:auto-backport-of-pr-55138-on-2.1.x

5. Create a PR against branch 2.1.x, I would have named this PR:

"Backport PR #55138 on branch 2.1.x (BUG: Silence Period[B] warnings in plotting code)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.

[mroeschke]

@meeseeksdev backport 2.1.x

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 2.1.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 6e6a6831aaa2d1606aa897b34f106e655180034b

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #55138: BUG: Silence `Period[B]` warnings in plotting code'

4. Push to a named branch:

git push YOURFORK 2.1.x:auto-backport-of-pr-55138-on-2.1.x

5. Create a PR against branch 2.1.x, I would have named this PR:

"Backport PR #55138 on branch 2.1.x (BUG: Silence Period[B] warnings in plotting code)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.