Scrutinizer Auto-Fixes

@shanethehat requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/shanethehat/pretty-xml/inspections/d8133870-a76e-4c3e-8d51-c068fddc9217

Enabled analysis tools:
 - PHP Analyzer
 - PHP PDepend
 - PHP Similarity Analyzer
 - PHP Change Tracking Analyzer