CRM-12595 fix formatting in api files

api/class.api.php

api/v2/Case.php

api/v2/Contact.php

api/v3/ActivityType.php

api/v3/Address.php

api/v3/Batch.php

api/v3/Campaign.php

api/v3/Case.php

api/v3/Constant.php

api/v3/ContactType.php

api/v3/Contribution.php

api/v3/ContributionRecur.php

api/v3/CustomField.php

api/v3/CustomGroup.php

api/v3/CustomValue.php

api/v3/Domain.php

api/v3/Email.php

api/v3/Entity.php

api/v3/EntityTag.php

api/v3/Event.php