Assorted spelling fixes

[Dan Kegel]

On Jan 24, 2008 2:20 PM, Austin English <austinenglish at gmail.com> wrote:
> > I never thought about it before, but "centred" is perfectly fine
> > English, at least in England.
> > Guess I need to add that to stop.txt.
>
> I've never seen it used personally.

My test for whether a word is commonly used is to
search for it on the internet.  'centred' turns out to
be very common, 9 million hits.

So our intuition is wrong there -- it's a common
Britishism, and it should be left alone.
- Dan