Is it possible with nim to use fmt (or &) with variables , and not only static
string ? It seems that variable is possible since 2021 (
https://github.com/nim-lang/Nim/pull/18274 ), but i cannot get it.

I'd like to have a generic support, like:
var hello = "hello {user}"
var goodby = "good bye {user}, see you soon on {sysname}"

with the actual form, i'm afraid i cannot use strings coming from a file and put
in a variable after reading