Scrutinizer Auto-Fixes

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/bee4/httpclient/inspections/66e92b0f-bf38-4cde-9921-6643a17bb82f

Enabled analysis tools:
 - PHP Analyzer
 - PHP Mess Detector
 - PHP CS Fixer
 - Security Advisory Checker
 - PHP PDepend
 - PHP Similarity Analyzer
 - PHP Change Tracking Analyzer
Merge pull request #2 from shulard/scrutinizer-patch-1

Scrutinizer Auto-Fixes on documentation