fix typos + brackets
fix typos + brackets

Author: Anastasia Aizman <anastasia.aizman@gmail.com>

Closes #143 from anastasia/patch-1.

mattroberts297/spark-xml,lokm01/spark-xml,lokm01/spark-xml,mattroberts297/spark-xml,lokm01/spark-xml,databricks/spark-xml,mattroberts297/spark-xml,databricks/spark-xml