unless/else -> if/else.
I made WorksController#update slightly prettier~
Split out WorksController#update_preview_mode helper function.
Deduplication ftw.
Use `saved` as the condition, as was done elsewhere.
Deduplicate some code in WorksController#marktoread.
Re-format a case statement to avoid the silly 18-space indent.
Whoops. set_instances_variables_work != set_instance_variables_create.