code: @Override
    protected void visitRawTextNode(RawTextNode node) {
      // Escape special characters in the text before writing as a string.
      String exprText = BaseUtils.escapeToSoyString(node.getRawText(), false, QuoteStyle.SINGLE);
      pyExprs.add(new PyStringExpr(exprText));
    }
docs: Example:
  
  <pre>
  I'm feeling lucky!
  </pre>
  
  generates
  
  <pre>
  'I\'m feeling lucky!'
  </pre>