shawn42/polaris — pull request #1 by johnwilde (2011-12-02 22:09:36+00:00)
Title: Change type of closed list key from TwoDGridLocation to String

The SplayTreeMap was allowing duplicate keys using
TwoDGridLocation as a key. It behaves properly when
using a string.

Not sure if this is the right solution, but the tests now all pass.