In -Tascii mode, print "<?>" only for Unicode escapes of unknown

representation, not for character escapes with unknown names.
According to groff, the latter produce no output, and we now warn
about them.

1 files changed, 3 insertions, 9 deletions

diff --git a/term.c b/term.c
index ecbfdf6a..10516d14 100644
--- a/term.c
+++ b/term.c
@@ -458,9 +458,7 @@ term_word(struct termp *p, const char *word)
 			if (p->enc == TERMENC_ASCII) {
 				cp = mchars_spec2str(p->symtab,
 				    seq, sz, &ssz);
-				if (cp == NULL)
-					encode(p, "<?>", 3);
-				else
+				if (cp != NULL)
 					encode(p, cp, ssz);
 			} else {
 				uc = mchars_spec2cp(p->symtab, seq, sz);
@@ -690,14 +688,10 @@ term_strlen(const struct termp *p, const char *cp)
 					sz += cond_width(p, c, &skip);
 				break;
 			case ESCAPE_SPECIAL:
-				if (p->enc == TERMENC_ASCII) {
+				if (p->enc == TERMENC_ASCII)
 					rhs = mchars_spec2str(p->symtab,
 					    seq, ssz, &rsz);
-					if (rhs == NULL) {
-						rhs = "<?>";
-						rsz = 3;
-					}
-				} else {
+				else {
 					c = mchars_spec2cp(p->symtab,
 					    seq, ssz);
 					if (c > 0)