Man pages matching name err in section 3:

err.3.en	debian 10 / manpages-dev
err.3.es	debian 10 / manpages-es
err.3.it	debian 10 / manpages-it
err.3.ja	debian 10 / manpages-ja-dev
err.3.en	debian 11 / manpages-dev
err.3.es	debian 11 / manpages-es-dev
err.3.fr	debian 11 / manpages-fr-dev
err.3.it	debian 11 / manpages-it-dev
err.3.ja	debian 11 / manpages-ja-dev
err.3.en	debian 12 / manpages-dev
err.3.es	debian 12 / manpages-es-dev
err.3.fr	debian 12 / manpages-fr-dev
err.3.it	debian 12 / manpages-it-dev
err.3.ja	debian 12 / manpages-ja-dev