Merge pull request #20426 from nextcloud/techdebt/psr2

apps/comments/lib/AppInfo/Application.php

apps/contactsinteraction/lib/AddressBook.php

apps/contactsinteraction/lib/Card.php

apps/dav/lib/AppInfo/Application.php

apps/dav/lib/CalDAV/Activity/Provider/Calendar.php

apps/dav/lib/CalDAV/Activity/Provider/Event.php

apps/dav/lib/CalDAV/BirthdayCalendar/EnablePlugin.php

apps/dav/lib/CalDAV/BirthdayService.php

apps/dav/lib/CalDAV/CalDavBackend.php

apps/dav/lib/CalDAV/CalendarHome.php

apps/dav/lib/CalDAV/CalendarObject.php

apps/dav/lib/CalDAV/CalendarRoot.php

apps/dav/lib/CalDAV/Outbox.php

apps/dav/lib/CalDAV/Plugin.php

apps/dav/lib/CalDAV/Principal/Collection.php

apps/dav/lib/CalDAV/Principal/User.php

apps/dav/lib/CalDAV/Proxy/ProxyMapper.php

apps/dav/lib/CalDAV/PublicCalendarRoot.php

apps/dav/lib/CalDAV/Publishing/PublishPlugin.php

apps/dav/lib/CalDAV/Publishing/Xml/Publisher.php