forked from extern/nushell
``` Error: nu::parser::not_a_constant (link) × Not a constant. ╭─[entry #23:1:1] 1 │ let file = "/home/user/file"; source $file · ──┬── · ╰── Value is not a parse-time constant ╰──── help: Only a subset of expressions are allowed constants during parsing. Try using the 'let' command or typing the value literally. ``` this pr changes the help message to 'Try using the `const` command ...'