Problem in trap help message

[Rafael Fontenelle via Bug reports for the GNU Bourne Again SHell]

Translating bash 5.3-pre1, I faced a string change in trap's help message
that I didn't quite understand. The phrase in 5.3-pre1:

---
If a SIGNAL_SPEC is DEBUG, ACTION is executed before every simple command
and selected other commands.
---

The "and selected other commands" part was added in this new release.

Can this please be clarified?

Best regards,
Rafael