/usr/share/php/Horde/Imap/Client/Data/Format/ is in php-horde-imap-client 2.25.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/Imap/Client/Data/Format/Astring/
/usr/share/php/Horde/Imap/Client/Data/Format/Astring.php
/usr/share/php/Horde/Imap/Client/Data/Format/Astring/Nonascii.php
/usr/share/php/Horde/Imap/Client/Data/Format/Atom.php
/usr/share/php/Horde/Imap/Client/Data/Format/Date.php
/usr/share/php/Horde/Imap/Client/Data/Format/DateTime.php
/usr/share/php/Horde/Imap/Client/Data/Format/Exception.php
/usr/share/php/Horde/Imap/Client/Data/Format/Filter/
/usr/share/php/Horde/Imap/Client/Data/Format/Filter/Quote.php
/usr/share/php/Horde/Imap/Client/Data/Format/Filter/String.php
/usr/share/php/Horde/Imap/Client/Data/Format/List.php
/usr/share/php/Horde/Imap/Client/Data/Format/ListMailbox/
/usr/share/php/Horde/Imap/Client/Data/Format/ListMailbox.php
/usr/share/php/Horde/Imap/Client/Data/Format/ListMailbox/Utf8.php
/usr/share/php/Horde/Imap/Client/Data/Format/Mailbox/
/usr/share/php/Horde/Imap/Client/Data/Format/Mailbox.php
/usr/share/php/Horde/Imap/Client/Data/Format/Mailbox/Utf8.php
/usr/share/php/Horde/Imap/Client/Data/Format/Nil.php
/usr/share/php/Horde/Imap/Client/Data/Format/Nstring/
/usr/share/php/Horde/Imap/Client/Data/Format/Nstring.php
/usr/share/php/Horde/Imap/Client/Data/Format/Nstring/Nonascii.php
/usr/share/php/Horde/Imap/Client/Data/Format/Number.php
/usr/share/php/Horde/Imap/Client/Data/Format/String/
/usr/share/php/Horde/Imap/Client/Data/Format/String.php
/usr/share/php/Horde/Imap/Client/Data/Format/String/Nonascii.php
/usr/share/php/Horde/Imap/Client/Data/Format/String/Support/
/usr/share/php/Horde/Imap/Client/Data/Format/String/Support/Nonascii.php