title: Remove \n from multiline quoted string in PyParsing
body: <p>I'm parsing a multiline quoted string with the following:</p>
  
  <p>The file with the string (test.txt):</p>
  
  <pre><code>PROPERTY PName "Multiline quoted 
  string" ;
  </code></pre>
  
  <p>The Python code:</p>
  
  <pre><code>linebreak = pp.Suppress(';')
  identifier = pp.Word(pp.alphanums + '._!&lt;&gt;/[]$')
  qs = pp.QuotedString('"', multiline = True)
  
  ifile = open("test.txt",'r')
  test_string = ifile.read()
  ifile.close()
  
  PROPERTY = (pp.Suppress(pp.Keyword('PROPERTY'))
              + identifier('propName')
              + qs('propValue')
              + linebreak
             )
  
  for t, s, e in PROPERTY.scanString(test_string):
      t.asDict()
  </code></pre>
  
  <p>Which yields:</p>
  
  <pre><code>"PROPERTY": {
          "propName": "PName",
          "propValue": "Multiline quoted \n   string"
        }
  </code></pre>
  
  <p>Is it possible to remove the '\n' during the parsing time ? </p>