[Merge] Not all whitespace is unicode

[Martin Pool]

On 31 Jan 2007, Henry Ludemann <henry at hl.id.au> wrote:
> Fix that changes the assumption that whitespace characters are
> convertible to unicode.
> 
> I'm not sure if this should be applied; it was to fix a problem I
> experienced when using tailor to control bzr under windows python while
> in cygwin; who know's if this correct or not :-)

There is something extremely strange going on if there are any
characters in string.whitespace that are not convertable to unicode...

Maybe string.whitespace is locale-dependent?  If it is, we could just
hardcode the ascii value here.

-- 
Martin