Update run-agent-master.md

Author: hlindberg

how-to/run-agent-master.md

@@ -1,12 +1,13 @@
 Run Agent and Master from source on same machine
 ==
-
+```
 bundle exec puppet puppet master --no-daemonize --certname localhost --dns_alt_names localhost --verbose
 bundle exec puppet agent -t --certname localhost --server localhost
+```
 
-````
 To re-set the CSR process for an agent:
 
+````
 on the master: puppet cert clean <agent fqdn>
 on the agent: remove the ssldir
-````
+````