Docs: http://docs.angularjs.org/api/ng.filter:date 'Z' example in format strings is incorrect

[ghost]

http://docs.angularjs.org/api/ng.filter:date

'Z': 4 digit (+sign) representation of the timezone offset (-1200-1200)

should probably be something like:
'Z': 4 digit (+sign) representation of the timezone offset (+1200 or -1200)

notice the + sign example, whereas the current version shows - twice