Need help with custom string formatter

[Robert Latest]

Cameron Simpson wrote:
> Stefan's code implements it's own format_field and falls back to the 
> original format_field(). That's standard subclassing practice, and worth 
> doing reflexively more of the time - it avoids _knowing_ that 
> format_field() just calls format().
>
> So I'd take Stefan's statement above to imply that calling format() 
> directly should work.

Yup, makes sense.