allowed: params.fragment &&
params.fragment.isValid() &&
params.fragment instanceof params.fragment.TextRangeFragment &&
- params.fragment.hasSameBoundries() &&
+ params.fragment.hasSameBoundaries() &&
params.fragment.startNode.isInside('exercise.replace') &&
!params.fragment.startNode.isInside({tagName: 'span', klass: 'answer'}),