Fix missing code block in the docs

Michael Friedrich · Michael Friedrich · commit e12e04e18cc7 · 2017-08-08T12:21:09.000+02:00
refs #5475
diff --git a/doc/03-monitoring-basics.md b/doc/03-monitoring-basics.md
@@ -1603,6 +1603,7 @@ configuration files.
 
 A quick-fix is shown below:
 
+```
 @@ -5,7 +5,8 @@ object NotificationCommand "mail-host-notification" {
 
    env = {
