Bulk Operation

SPARK-6813 Ignore commented code warnings in SparkR

SPARK-6813 Fix remaining SparkR style violations

SPARK-6813 local variable assigned but may not be used

SPARK-6813 Closing curly-braces should always be on their own line

SPARK-6813 Get rid of the warnings about `no visible global function definition` in SparkR

SPARK-6813 Fix single-quotes strings in SparkR

SPARK-6813 Fix spaces around parens, infix operators etc.

SPARK-6813 Fix comments after curly braces

SPARK-6813 Fix assignments in SparkR

SPARK-6813 Fix the line length of SparkR

SPARK-6813 Remove the trailing whitespaces from the SparkR files

SPARK-6813 Add a validation rule about the curly braces in SparkR to `.lintr`

SPARK-6813 Add settings to kick `lint-r` from `./dev/run-test.py`

SPARK-6813 Add a `.lintr` file to validate the SparkR files and the `lint-r` script