Function expry::expry_compile_error_format

pub fn expry_compile_error_format(
    expr: &str, 
    e: &CompileError<'_>, 
    extra_line_no: u32
) -> (u32, String)

Formats errors from compilation with a nice layout and underlines on the source lines, so that users can easily understand what to do. Returns the line number of the main error, and a string that can be displayed to the user.