Demo_Gen: Better Organized Output

[ambiguousname]

Something cleaner than

import { DataProvider } from "./js/DataProvider.mjs"
import { FixedDecimal } from "./js/FixedDecimal.mjs"
import { FixedDecimalFormatter } from "./js/FixedDecimalFormatter.mjs"
import { FixedDecimalFormatterOptions } from "./js/FixedDecimalFormatterOptions.mjs"
import { Locale } from "./js/Locale.mjs"
export function formatWrite() {
    var terminusArgs = arguments;
    return (function (...args) { return args[0].formatWrite(...args.slice(1)) }).apply(
        null,
        [
            FixedDecimalFormatter.tryNew.apply(
                null,
                [
                    Locale.new_.apply(
                        null,
                        [
                            terminusArgs[0]
                        ]
                    ),
                    DataProvider.newStatic.apply(
                        null,
                        [
                        ]
                    ),
                    (function (...args) {
                        let out = new FixedDecimalFormatterOptions();
                        
                        out.groupingStrategy = args[0];
                        
                        out.someOtherConfig = args[1];
                        
                        return out;
                    }).apply(
                        null,
                        [
                            terminusArgs[1],
                            terminusArgs[2]
                        ]
                    )
                ]
            ),
            FixedDecimal.new_.apply(
                null,
                [
                    terminusArgs[3]
                ]
            )
        ]
    );
}

Would be nice.

@Manishearth I know this confusing for you, if you have any thoughts about organization, let me know!

[ambiguousname]

#500 (comment) is also part of this

[Manishearth]

I think it's fine. Would be nice if the code were linear instead of nested, with let locale = blah, etc, naming the intermediates by the same scheme we use to name the terminus args.

Which, speaking of, ideally those are named too.