How to strip "control characters" from a CharSequence?
<p>I have <code>CharSequence source, int start, int end</code></p>

<p>I would like to strip all "control characters" from source between start and end and return this as a new CharSequence</p>

<p>by "control character" I mean undeseriable characters like Tab and Return, line feeds and such... basically all that was in ASCII &lt; 32 (space) ... but I don't know how to do it in this "modern age"</p>

<p>what is a <code>char</code>? is it unicode? How can I remove these "control characters" ?</p>
