because I started writing the filter just to translate response codes,  and I wanted it `readable`,  but didn't care about `'pretty`.       Once I realized I wanted it to be a general translator filter it was useful to leave in there for testing purposes.     No real need for a default beyond that. 

I'm ambivalent ....   can remove it,   or prettify it.    or just leave it as is.    Pick one and I'll modify :)