Display key requirements

A display key name cannot contain spaces, and it must be defined on a single line.

A display key value can contain any string that the Java.util.Properties.load method accepts. Escape the characters { (curly brace) and \ (backslash) with a backslash (for example, \{ and \\). You can also use codes such as \n for a newline, or \u for Unicode characters (for example, \u00A0 for a non-breaking space).