message: docs(mapper): change comment
diff: @@ -1017,8 +1017,7 @@ export default class Mapper {
  }
  /**
  - * Returns an array that holds a list of documents that identify
  - * key patters for the indexes defined on the collection.
  + * Returns an array of key patters for the indexes defined on the collection.
  *
  * @param {Collection} collection
  *
  