Parse and ignore the escape sequences \, and \/ (italic corrections).

Actually using these is very stupid because they are groff extensions
and other roff(7) implementations typically print unintended characters
at the places where they are used.
Nevertheless, some manuals contain them, for example ocserv(8).
Problem reported by Kurt Jaeger <pi at FreeBSD>.

1 files changed, 4 insertions, 0 deletions

diff --git a/mandoc.c b/mandoc.c
index 8ced0496..3e838534 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -95,6 +95,10 @@ mandoc_escape(const char **end, const char **start, int *sz)
 	case 'd':
 		/* FALLTHROUGH */
 	case 'u':
+		/* FALLTHROUGH */
+	case ',':
+		/* FALLTHROUGH */
+	case '/':
 		return(ESCAPE_IGNORE);
 
 	/*