Minor manpage fix

noice.1

@@ -101,8 +101,7 @@ struct assoc assocs[] = {
 };
 .Ed
 .Sh KNOWN ISSUES
-If you are using urxvt you might have to start it with
-backspacekey set to DEC.
+If you are using urxvt you might have to set backspacekey to DEC.
 .Pp
 .Sh AUTHORS
 .Nm