Returns a newline for generating html, only if we are not in MINIMIZE mode. Do NOT use for generating newlines inside of strings. The primary purpose of this function is to make HTML and other code that will appear in a browser more readable and easier to debug in development mode.
If a string is given, it will make sure the string ends with a newline, and return the string with a newline attached to the end. If a newline is already there, the string will be returned as is. All this provided we are not in MINIMIZE mode. Otherwise we return the string unchanged.