<h3>format() function</h3>
Format a string using supplied arguments. 

<h4>Syntax</h4>
<code>format('string', arg, [arg...n])</code><br>

<h4>Arguments</h4>
<code>string</code> - is string.  String with Qt QString place holders.  Use %1, %2, etc for placeholders. Placeholders can be repeated. 
<br>
<code>arg [arg...n]</code> - any type. Any number of args. 

<h4>Example</h4>
<!-- Show example of function.-->
<code>format('This %1 a %2','is', 'test') &rarr; This is a test</code><br>