> EE This is a non-standard GNU extension. In mandoc(1), it does the > same as the roff(7) fi request (switch to fill mode). > > EX This is a non-standard GNU extension. In mandoc(1), it does the > same as the roff(7) nf request (switch to no-fill mode).
"Gnu extension" should be read as "extension adopted by Gnu". .EX/.EE was introduced in 9th Edition Unix.
