I found this by accident. diff -r cc48d5f4eaa7 rc/bin/doctype --- a/rc/bin/doctype Mon May 31 19:30:07 2021 -0700 +++ b/rc/bin/doctype Thu Jun 03 01:55:47 2021 +0000 @@ -13,7 +13,7 @@ dev='' while(~ $1 -*){ switch($1){ - case -n; + case -n troff=nroff eqn=neqn prefer='prefer -n' @@ -21,7 +21,7 @@ dev=-T$2 shift case -* - opt=$opt' $1' + opt=$opt' '$1 } shift } --