The above is a guess of which plugin preforms the function you are missing.
Awesome. Thanks Tim. I did disable Code Completion. Sounds like the right plugin, doesn't it? I'll enable and restart C::B (just in case it needs that). I originally disabled Code Completion in an attempt to prevent the editor completing brackets, braces, brokets and array operators. I like brackets *my* way.
(I found what I wanted in editor settings, and forgot to re-enable Code Completion.)