Z:gnu-man-db-manpages--c58d18-A formatting pipeline is forme/en

A formatting pipeline is formed from the filters and the primary formatter (B or [B]B with B<-t>) and executed. Alternatively, if an executable program I (or I with B<-t>) exists in the man tree root, it is executed instead. It gets passed the manual source file, the preprocessor string, and optionally the device specified with B<-T> or B<-E> as arguments.