symfony/symfony-docs — pull request #2115 by Sgoettschkes (2013-01-08 20:31:21+00:00)
Title: [Validation] Update CardScheme

The CardScheme validator changed with PR https://github.com/symfony/symfony/pull/6583, so I improved the docs, mentioning that it now takes a mixed parameter and also clarifying that this parameter can be either a string or an array.