When finding the roff .it request (line trap),

make it clear that you cannot use mandoc to format that page (yet).
Triggered by a report from brad@, ok kristaps@.

2 files changed, 6 insertions, 1 deletions

diff --git a/main.c b/main.c
index 9568e5da..6075d520 100644
--- a/main.c
+++ b/main.c
@@ -196,7 +196,7 @@ static	const char * const	mandocerrs[MANDOCERR_MAX] = {
 	"escaped character not allowed in a name",
 	"skipping text before the first section header",
 	"skipping unknown macro",
-	"NOT IMPLEMENTED: skipping request",
+	"NOT IMPLEMENTED, please use groff: skipping request",
 	"line scope broken",
 	"argument count wrong",
 	"skipping end of block that is not open",
diff --git a/roff.c b/roff.c
index caba9939..73365293 100644
--- a/roff.c
+++ b/roff.c
@@ -51,6 +51,7 @@ enum	rofft {
 	ROFF_ie,
 	ROFF_if,
 	ROFF_ig,
+	ROFF_it,
 	ROFF_ne,
 	ROFF_nh,
 	ROFF_nr,
@@ -172,6 +173,7 @@ static	struct roffmac	 roffs[ROFF_MAX] = {
 	{ "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
 	{ "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
 	{ "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
+	{ "it", roff_line_ignore, NULL, NULL, 0, NULL },
 	{ "ne", roff_line_ignore, NULL, NULL, 0, NULL },
 	{ "nh", roff_line_ignore, NULL, NULL, 0, NULL },
 	{ "nr", roff_nr, NULL, NULL, 0, NULL },
@@ -935,6 +937,9 @@ static enum rofferr
 roff_line_ignore(ROFF_ARGS)
 {
 
+	if (ROFF_it == tok)
+		(*r->msg)(MANDOCERR_REQUEST, r->data, ln, ppos, "it");
+
 	return(ROFF_IGN);
 }