Fixing expression parameters for orderBy.

[robwormald]

This seems to be a typo, unless I'm missing something - generated Usage example is wrong.

See http://stackoverflow.com/questions/23093953/is-the-angular-orderby-documentation-wrong-or-am-i-confused

[mary-poppins]

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• Uses the issue template (#7170)

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[mary-poppins]

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[IgorMinar]

the template used for generating the docs page is incorrect. I filed a new issue for that: #7184

[IgorMinar]

thanks for bringing this to our attention. I'm closing this PR since it doesn't properly correct the problem.