Display system assume one type of output is returned e.g. TEXT or one of the magic words. this prevents paragraph such as scala to use magic words for output.
// Not working paragraph :
val bankText = sc.parallelize(1 to 10)
bankText: org.apache.spark.rdd.RDD[Int] = ParallelCollectionRDD at parallelize at <console>:23
%table col1 col2