Man pages matching name mail::message::convert::textautoformat in section 3pm:

Mail::Message::Convert::TextAutoformat.3pm.en	debian 10 / libmail-message-perl
Mail::Message::Convert::TextAutoformat.3pm.en	debian 11 / libmail-message-perl
Mail::Message::Convert::TextAutoformat.3pm.en	debian 12 / libmail-message-perl