numberStepFactories.separator returns NaN for negative numbers with three digits

[ncote]

The default numberStepFactories.separator (i.e. with three-digit groupings) shows NaN for negative numbers having exactly three digits (or rather multiples of three digits).

Example:

$('#world-population').animateNumber( {
      number: -222,
      numberStep: $.animateNumber.numberStepFactories.separator(',')
      });

This will show "NaN,222" , presumably because the negative sign is left in a digit group by itself.

[aishek]

Just published v0.0.14 with fixes for the issue.

@ncote kudos for reporting!