set flag tok_formatDollarVars_debug.

svoid test_tok_eventInterfaces() {
  // no args
  testTranspilationFunction tok_eventInterfaces(
    [[
      transient event interface onRecordAdded as OnRecordAdded shipping RecordAdded;
    ]],
    [[
      interface onRecordAdded {
        void OnRecordAdded(RecordAdded event);
      }
      
      transient L<onRecordAdded> OnRecordAdded_listeners;
      synchronized selfType OnRecordAdded(onRecordAdded l) { OnRecordAdded_listeners = addOrCreate(OnRecordAdded_listeners, l); this; }
      synchronized Cl<onRecordAdded> OnRecordAdded_listeners() { ret cloneList(OnRecordAdded_listeners); }
      void OnRecordAdded(RecordAdded event) { for (l : OnRecordAdded_listeners()) pcall { l?.OnRecordAdded(event); } }
    ]]);
}

Began life as a copy of #1027846