If a pasted attachment has expired, you get told instead of quietly sending a prompt without it.
What's wrong with this entry?
On submit, pasted entries that are no longer available are removed and you get an immediate notification rather than a prompt that quietly lost its attachment. If nothing is left after stripping, or the input was a bash or slash command, the submit is aborted and your original text is restored.
- Editing across multiple inputs also renumbers colliding pasted-text ids, so pastes from different inputs no longer overwrite each other.
pasted-text-unavailable
Strings lifted out of the shipped bundle, so the claim above can be checked against them.