Github user pwendell commented on the pull request:
https://github.com/apache/incubator-spark/pull/616#issuecomment-35459440
Hey so I looked at it more closely, we need to look on a case-by-case basis
where this is used. Some of the cases should be changed to 2.10.3 and others
should stay as 2.10. I think most of them should stay as-is but we should
probably rename what is now SCALA_VERSION to SCALA_BINARY_VERSION.
The main one I think we need to change is in quick-start.md but there may
be others as well. If you look at the release audit script, I did something
similar there where we used both SCALA_VERSION and SCALA_BINARY_VERSION.
https://github.com/pwendell/spark-utils/blob/master/release-audits/release_auditor.py#L19
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