minor #3980 Clarifies allow-risky usage (josephzidell)
minor #3980 Clarifies allow-risky usage (josephzidell)

This PR was merged into the 2.12 branch.

Discussion
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Clarifies allow-risky usage

Redo of #3978

Commits
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50fff0b Clarifies allow-risky usage

keradus/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,GrahamCampbell/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,GrahamCampbell/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,keradus/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer