why use string for this example of appender?

[Boris-Barboris]

On Monday, 16 April 2018 at 06:46:36 UTC, WhatMeForget wrote:

> Another thing that had me wondering is the use of put() down 
> below; doesn't the append syntax (~=) give you the same exact 
> functionality; so why bother?

Appender also performs unicode-related conversions, so you can 
append dstring to string and vice-versa, wich may come in handy.