Correctly pluralize participants on issue show page
Right now, if there is only one participants, the issue show page says "1 participants" instead of "1 participant." This commit uses pluralize() to fix that.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Right now, if there is only one participants, the issue show page says "1 participants" instead of "1 participant." This commit uses pluralize() to fix that.