Text.PrettyPrint mixes tabs and spaces??

[Simon Marlow]

> >From Text.PrettyPrint.HughesPJ:
> 
> indent n | n >= 8 = '\t' : indent (n - 8)
>          | otherwise      = spaces n
> 
> I consider it seriously evil to mix tabs and spaces for indentation.
> *Seriously* evil. Kill-on-sight evil.
> 
> Not to mention that LaTeX's \verbatiminput does not handle tabs, which
> makes the result look like, well, crap.
> 
> If there are people who want to mix tabs and spaces, fine, 
> but at least give me a flag that turns it off. Please?

He's right; tabs aren't necessarily every 8 columns everywhere, so the generic pretty printing library shouldn't make this assumption.  I'll remove it, unless there are any objections.

Cheers,
	Simon