Constructor and representer for datetimes with timezone do not match

[lele@…]

I noticed what seems a little glitch in PyYAML handling of datetime when they carry a timezone.

The regexp used to match the various fields assumes there is a separator between the fractional part and the timezone offset, while the representer simply appends the offset without any separator, effectively resulting in a wrong representation (in the case the offset is positive).

Moreover, unicode(data.utcoffset()) gives something like "-1 day, 22:00" for an offset of -2 hours.

[xi]

Fixed in [225], although I'm not entirely happy with throwing away tzinfo.

It's possible to pickle the tzinfo attribute, but this will break compatibility with the !!timestamp` spec:  http://yaml.org/type/timestamp.html