message: docs: Fixes typo in FormArray
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diff: @@ -1547,7 +1547,7 @@ export class FormArray extends AbstractControl {
  * Creates a new `FormArray` instance.
  *
  * @param controls An array of child controls. Each child control is given an index
  - * wheh it is registered.
  + * where it is registered.
  *
  * @param validatorOrOpts A synchronous validator function, or an array of
  * such functions, or an `AbstractControlOptions` object that contains validation functions
  