task_manager.list_all_tasks() is not showing outputs properly.

[rodosingh]

1. task_manager.list_all_tasks() function in line 409 needs to be written as follows to prevent improper display of all tasks in terminal. I am running in docker and there \n character isn't properly executing. So need to add flush=True in print statement.
2. Since return of task_manager.list_all_tasks() is string and adding "\n - ".join() along with sorted() functionality is making it worse.
3. Correction of line 409; eval_logger.info("Available Tasks:\n - {}".format(task_manager.list_all_tasks()), flush=True)