--- src/usr.bin/yacc/yacc.1	2006/02/17 19:39:18	1.4
+++ src/usr.bin/yacc/yacc.1	2007/07/30 22:11:33	1.5
@@ -171,4 +171,5 @@ utility conforms to
 .Sh HISTORY
 A
 .Nm
-command appeared in PWB UNIX.
+command appeared in PWB
+.Ux .