title: Scala raw strings error in unicode escape
body: <p>In a Scala String need to include this literal verbatim: <code>\usepackage{x}</code>. Thus, desired would be that for</p>
  
  <pre><code>val s = """ ... \usepackage{X} ... """
  
  println(s)
  ... \usepackage{X} ...
  </code></pre>
  
  <p>Attempts so far include,</p>
  
  <pre><code>scala&gt; """\usepackage{X}"""
  &lt;console&gt;:1: error: error in unicode escape
         """\usepackage{X}"""
              ^
  
  scala&gt; raw"""\usepackage{X}"""
  &lt;console&gt;:1: error: error in unicode escape
         raw"""\usepackage{X}"""
                 ^
  </code></pre>
  
  <p>Single double-quoted strings prove unsuccessful as well. </p>
  
  <p>Following <a href="http://docs.scala-lang.org/overviews/core/string-interpolation.html" rel="noreferrer">http://docs.scala-lang.org/overviews/core/string-interpolation.html</a> , a working example includes</p>
  
  <pre><code>scala&gt; raw"a\nb"
  res1: String = a\nb
  </code></pre>
  
  <p>which does not cover unicode cases.</p>