Fix ip-monitor manual page what-is entry

Debian warning that NAME wasn't parsible
diff --git a/man/man8/ip-monitor.8 b/man/man8/ip-monitor.8
index d406216..351a744 100644
--- a/man/man8/ip-monitor.8
+++ b/man/man8/ip-monitor.8
@@ -1,6 +1,6 @@
 .TH IP\-MONITOR 8 "20 Dec 2011" "iproute2" "Linux"
 .SH "NAME"
-ip-monitor and rtmon \- state monitoring
+ip-monitor, rtmon \- state monitoring
 .SH "SYNOPSIS"
 .sp
 .ad l