private void emitOrAppendTwo(char[] val, int returnState)
            throws SAXException {
        if ((returnState & DATA_AND_RCDATA_MASK) != 0) {
            appendLongStrBuf(val[0]);
            appendLongStrBuf(val[1]);
        }
    }
Collect a set of attribues and values from the data part of a PI.

<p>
The bulk of this method and associated methods that follow it here are
copied from the nu.validator.htmlparser.impl.Tokenizer class, with
appropriate modifications.
</p>

@see nu.validator.htmlparser.impl.Tokenizer
@see nu.validator.htmlparser.impl.ErrorReportingTokenizer
src/nu/validator/checker/XmlPiChecker.java