formatting fix for LDAP realm documentation
spacing of "```" block causing it to be ignored, and the rest of the contents to be rendered incorrectly.
### What is this PR for?
The LDAP section of the documentation for zeppelin-0.7.3 renders incorrectly, here:
http://zeppelin.apache.org/docs/0.7.3/security/shiroauthentication.html
It looks correct on GitHub, but not on the standalone site. This should fix it.
### What type of PR is it?
[Documentation | Bug Fix]
### Questions:
* Does the licenses files need update? no
* Is there breaking changes for older versions? none known
* Does this needs documentation? no
diff --git a/docs/security/shiroauthentication.md b/docs/security/shiroauthentication.md
index 75a52e1..bf5e8e3 100644
--- a/docs/security/shiroauthentication.md
+++ b/docs/security/shiroauthentication.md
@@ -143,7 +143,8 @@
The other more flexible option is to use the LdapRealm. It allows for mapping of ldapgroups to roles and also allows for
role/group based authentication into the zeppelin server. Sample configuration for this realm is given below.
- ```
+
+```
[main]
ldapRealm=org.apache.zeppelin.realm.LdapRealm
@@ -179,7 +180,7 @@
ldapRealm.permissionsByRole= user_role = *:ToDoItemsJdo:*:*, *:ToDoItem:*:*; admin_role = *
securityManager.sessionManager = $sessionManager
securityManager.realms = $ldapRealm
- ```
+```
### PAM
[PAM](https://en.wikipedia.org/wiki/Pluggable_authentication_module) authentication support allows the reuse of existing authentication
