Man pages matching name re_format in section 7:

re_format.7.en	debian 10 / manpages
re_format.7.en	debian 11 / manpages
re_format.7.es	debian 11 / manpages-es
re_format.7.it	debian 11 / manpages-it
re_format.7.en	debian 12 / manpages
re_format.7.es	debian 12 / manpages-es
re_format.7.it	debian 12 / manpages-it