For selecting a two-digit font size, support the historic syntax \s12

in addition to the classic syntax \s(12, the modern syntax \s[12],
and the alternative syntax \s'12'.  The historic syntax only works
for the font sizes 10-39.
Real-world usage found by naddy@ in plan9/rc.

1 files changed, 8 insertions, 0 deletions

diff --git a/mandoc.c b/mandoc.c
index cd74f1a0..8ced0496 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -242,6 +242,14 @@ mandoc_escape(const char **end, const char **start, int *sz)
 			*start = ++*end;
 			term = '\'';
 			break;
+		case '3':
+			/* FALLTHROUGH */
+		case '2':
+			/* FALLTHROUGH */
+		case '1':
+			*sz = (*end)[-1] == 's' &&
+			    isdigit((unsigned char)(*end)[1]) ? 2 : 1;
+			break;
 		default:
 			*sz = 1;
 			break;