Allow specifying a display label different than the value in a suggestion

[ClementNerma]

I have set up a little completer for file paths in the shell I'm currently making.

Some of these paths have spaces in their name, which requires escaping. For instance the path hello world.txt would be put as "hello world.txt".

But, I don't want this escaping to appear in the completion menu. I'd like the suggestion to appear as hello world.txt but the inserted text to be "hello world.txt".

Would that be possible?