spark git commit: Typo fixes + code readability improvements

Repository: spark Updated Branches: refs/heads/branch-1.6 a91d21314 -> c859be2dd Typo fixes + code readability improvements Author: Jacek Laskowski Closes #9501 from jaceklaskowski/typos-with-style. (cherry picked from commit

spark git commit: Typo fixes + code readability improvements

Repository: spark Updated Branches: refs/heads/master 8211aab07 -> 62bb29077 Typo fixes + code readability improvements Author: Jacek Laskowski Closes #9501 from jaceklaskowski/typos-with-style. Project: http://git-wip-us.apache.org/repos/asf/spark/repo