Z:gnu-man-db-manpages--400e36-Normally, when output is being/en

Normally, when output is being directed to a terminal (usually to a pager), any error output from the command used to produce formatted versions of manual pages is discarded to avoid interfering with the pager's display. Programs such as B often produce relatively minor error messages about typographical problems such as poor alignment, which are unsightly and generally confusing when displayed along with the manual page. However, some users want to see them anyway, so, if $B is set to any non-empty value, error output will be displayed as usual.