Github user pwendell commented on a diff in the pull request:
https://github.com/apache/incubator-spark/pull/618#discussion_r9870730
--- Diff: docs/index.md ---
@@ -19,7 +19,7 @@ Spark uses [Simple Build Tool](http://www.scala-sbt.org),
which is bundled with
sbt/sbt assembly
-For its Scala API, Spark {{site.SPARK_VERSION}} depends on Scala
{{site.SCALA_VERSION}}. If you write applications in Scala, you will need to
use this same version of Scala in your own program -- newer major versions may
not work. You can get the right version of Scala from
[scala-lang.org](http://www.scala-lang.org/download/).
+For its Scala API, Spark {{site.SPARK_VERSION}} depends on Scala
{{site.SCALA_BINARY_VERSION}}. If you write applications in Scala, you will
need to use this same version of Scala in your own program -- newer major
versions may not work. You can get the right version of Scala from
[scala-lang.org](http://www.scala-lang.org/download/).
--- End diff --
To make this more clear, it might be good to say:
If you write applications in Scala, you will need to use a compatible
Scala version (e.g. {{site.SCALA_BINARY_VERSION}}.X) -- newer major versions
may not work.
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