[SPARK-8548][SparkR] Remove the trailing whitespaces from the SparkR files

[yu-iskw]

[SPARK-8548] Remove the trailing whitespaces from the SparkR files - ASF JIRA

• This is the result of lint-r
  https://gist.github.com/yu-iskw/0019b37a2c1167f33986

[yu-iskw]

@shivaram Could you review it please when you have time? Thanks!

[SparkQA]

Test build #35496 has finished for PR 6945 at commit 0bd567a.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • // class ParentClass(parentField: Int)
  • // class ChildClass(childField: Int) extends ParentClass(1)
  • // If the class type corresponding to current slot has writeObject() defined,
  • // then its not obvious which fields of the class will be serialized as the writeObject()
  • class SerializableConfiguration(@transient var value: Configuration) extends Serializable
  • class SerializableJobConf(@transient var value: JobConf) extends Serializable
  • class Module(object):
  • class NGram(override val uid: String)
  • class StreamingKMeansModel(KMeansModel):
  • class StreamingKMeans(object):
  • class PCAModel(JavaVectorTransformer):
  • class PCA(object):
  • case class UnresolvedAlias(child: Expression) extends NamedExpression
  • abstract class ExtractValueWithStruct extends ExtractValue
  • abstract class GeneratedClass
  • case class Bin(child: Expression)
  • case class Md5(child: Expression)

[AmplabJenkins]

Merged build finished. Test FAILed.

[shivaram]

Thanks @yu-iskw -- LGTM. Merging this

[shivaram]

Also FYI I also backported this to branch-1.4 as it'll make future cherry-picks easier.

[yu-iskw]

@shivaram Thank you for merging it!