Negative amounts?

[brianparks]

How to handle amounts < 0? In previous versions, I believe that the formatter worked correctly, converting an entry like "-10.00" to "($10.00)", but the angular binding is not updating the model with the negative value. In the current release, the formatter doesn't work either, and doesn't appear to allow a negative value at all.

[bcherny]

this does seem like a regression. with negative amounts, the behavior is very inconsistent.