visible spaces in l3sys-query results about latex3

[davidcarlisle]

I did wonder, maybe catcode 13, then you could easily get visible spaces if you wanted without having to tl_replace them all again.

[davidcarlisle]

if we do want to optimise I guess simplest is to wrap in a \tex_lowercase:D (as done elsewhere in this code) but guard

`Z+1

from being lowercased by replacing it by

91

[josephwright]

Do we want catcode 10 here, or would catcode 13 be more appropriate?

[josephwright]

I suggest making the change in \@@_get_query:Nw - it's short so would be easy to e-type expand and include the literal space as you suggest.

[josephwright]

Indeed: I think that's safe and also handy - I'll make the change and document the catcode setup.

[josephwright]

Sorted - I've also corrected and documented the rest of the catcode setup.