Incorrect {$meta: 'text'} reference in aggregation $sort error message

If you use an invalid sort-key value with the $sort pipeline operator, you receive this error message:
--> "exception: $sort key ordering must be specified using a number or {$meta: 'text'}"

The message should say {$meta: 'textScore'} instead of {$meta: 'text'}.

Version: 99fa4e6058a24d6c4d7fde19ce940719c5bbc210