paulmillr/es6-shim — pull request #199 by cscott (2014-01-29 15:54:53+00:00)
Title: Map/Set should treat -0 and +0 as identical keys.

The latest spec (Jan 20, 2014) uses SameValueZero (not SameValue) for comparisons. This is a change in the spec.

Closes: #129