Function arithmetic_expression_in_any_script_allowing_spaces 

fn arithmetic_expression_in_any_script_allowing_spaces<'a, I>() -> impl Parser<'a, I, (SimpleSpan, Script, ArithmeticExpression), Full<Rich<'a, Token>, State<'a>, ()>>
where
    I: Input<'a, Token = Token, Span = SimpleSpan> + ValueInput<'a>,