Scrutinizer Auto-Fixes

@WyriHaximus requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/WyriHaximus/HtmlCompress/inspections/3ab5f9f1-b435-45e8-8c09-09366eea6326

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