Hi! A common pattern in very old (especially pre-troff) manuals I read often is "aecn^H^H^H^H____" used to underline aecn ‒ this is a trivial consequence of being made for typewriters. [In the following examples a diacriticised character is used to represent that character but underlined.] groff handles this correctly, i.e. printf 'aecn\b\b\b\b____ ____\b\b\b\bAECN\n.br\na\b_\t_\bA' is rendered by groff as ąęćń ĄĘĆŃ ą Ą and by less as ą___ ĄECN .br ą Ą but by mandoc (1.14.5-1 and current CVS) as aecn????____ ____????AECN a?_ _?A It's unclear to me if this is supposed to happen, but I didn't see it in the TODO, so. Best, наб