Autocomplete: Announce autocomplete correctly in all ATs.

Fixes #9631
Closes gh-1153
Merge commit '0b28d597fe1857590c9719c8b41f00e77967f7d7'

* commit '0b28d597fe1857590c9719c8b41f00e77967f7d7':
  Autocomplete: Announce autocomplete correctly in all ATs.