title: Nokogiri to_xml without carriage returns
body: <p>I'm currently using the Nokogiri::XML::Builder class to construct an XML document, then calling .to_xml on it.  The resulting string always contains a bunch of spaces, linefeeds and carriage returns in between the nodes, and I can't for the life of me figure out how to get rid of them.  Here's an example:</p>
  
  <pre><code>b = Nokogiri::XML::Builder.new do |xml|
    xml.root do
      xml.text("Value")
    end
  end
  
  b.to_xml
  </code></pre>
  
  <p>This results in the following:</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  &lt;root&gt;Value&lt;/root&gt;
  </code></pre>
  
  <p>What I want is this (notice the missing newline):</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;&lt;root&gt;Value&lt;/root&gt;
  </code></pre>
  
  <p>How can this be done?  Thanks in advance!</p>