Github user felixcheung commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/328#issuecomment-146730179
because when spark is the default group, you can run pyspark by simply
putting `%pyspark%` at the beginning of the paragraph. This is my understanding
of @Leemoonsoo feedback - and matches the currently implemented omit rules.
`(default)` here is the default interpreter of the default group, which
means you can omit `%spark` or `%spark.spark` and the paragraph is will run as
Spark Scala. If there is a better way to represent that, please let me know.
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