Scrutinizer Auto-Fixes

@stof requested this pull request.

This patch was automatically generated as part of the following inspection:
https://scrutinizer-ci.com/g/phpspec/prophecy/inspections/4deac7fb-8f14-4b3c-bc11-74ecd7512184

Enabled analysis tools:
 - PHP Analyzer
 - PHP Copy/Paste Detector
 - PHP PDepend