Trim just white space, without escape characters
<p>Here is my string:</p>

<pre><code>"\tsome text\t\t\t\t"
</code></pre>

<p>And when I do:</p>

<pre><code>"\tsome text\t\t\t\t".Trim()
</code></pre>

<p>the \t are also deleted. How to avoid this?</p>
