Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/6947#issuecomment-116747028
@shivaram, I think the motivation here is to address local `dev/run-tests`
failures that are caused by the presence of these documentation files:
```
[joshrosen Spark (master)]$ ./dev/run-tests
[warn] Java 8 tests will not run because JDK version is < 1.8.
[info] Using build tool sbt with Hadoop profile hadoop2.3 under environment
local
[info] Found the following changed modules: root
========================================================================
Running Apache RAT checks
========================================================================
Could not find Apache license headers in the following files:
!????? /Users/joshrosen/Documents/spark/R/lib/SparkR/help/AnIndex
!????? /Users/joshrosen/Documents/spark/R/lib/SparkR/help/SparkR.rdb
!????? /Users/joshrosen/Documents/spark/R/lib/SparkR/html/00Index.html
!????? /Users/joshrosen/Documents/spark/R/lib/SparkR/html/R.css
('[error] running', '/Users/joshrosen/Documents/spark/dev/check-license',
'; received return code', 1)
```
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