Update docs to stop recommending FormattableMarkup

Is this a duplicate of 📌 Fix strict type errors in AssertContentTrait Needs work ?

Indeed, I'm wondering. Do we want to majorly expand the scope of that to update dozens of docblocks?

I think you're right. The important thing for enabling strict types is adding the casts, we can improve on docs and allowed types in this issue and / or follow ups.

I think the new text is fine. I used this script to change the instances in the issue summary.

Applied MR and searched for "use \Drupal\Component\Render\FormattableMarkup to embed" and all instances in core has been replaced.

Replacement also reads well.

nod_ → closed merge request !9273

Committed and pushed 19b213dbef to 11.x and 0a510d5c05 to 11.0.x and ca5b45e08a to 10.4.x and c3fe5c10d9 to 10.3.x. Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.