Added example(s) on "Understanding System Configuration Files"

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 7.0.x, 7.1.x, 7.2.x
• Component/s: Core Infrastructure, User and System Management
• Labels: None
• Type of Documentation: User

We received user feedback on the following article: 

• https://help.liferay.com/hc/en-us/articles/360017877292-Understanding-System-Configuration-Files

User Comments: *"*what about template placeholders in wiki portlet for example, that uses [] in content: emailPageUpdatedSubject="[Wiki [$NODE_NAME$]] page [$PAGE_TITLE$] was updated" can you maybe add an example to docu on how to deal with this special case?"