* Be logged in and go to a task which is closed as a duplicate and see the placeholder text in the field to add a comment.
* Be logged in and go to tasks which are not closed as a duplicate and see no placeholder text in the field to add a comment.
* Go to other places whose code calls a `PhabricatorApplicationTransactionCommentView` constructor and check that it still renders correctly, for example Ponder in http://phorge.localhost/Q1, Slowvote in http://phorge.localhost/V1, Differential in http://phorge.localhost/D1