Proposal: Add Text.PrettyPrint.HughesPJ.zeroText

[Cale Gibbard]

On 23/03/07, Neil Mitchell <ndmitchell at gmail.com> wrote:
> Hi
>
> > but I called it OOB text for 'out-of-band' text. I use it mainly for
> > xterm escape codes.
>
> I would have thought the term zeroText more accurately signifies the
> meaning, partly because out-of-band isn't such a commonly known
> phrase. If anyone can suggest anything better than zeroText, then I'm
> happy to hear it.

I don't know if I prefer one over the other, but in my attached
implementation of Wadler's pretty printer (basically stolen directly
from the paper), I'd called this control.

 - Cale
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