f the text</li>
          <li>Must not contain control characters</li>
          <li>Must not contain whitespace (ie tab, newline, ...) other than the
          standard 'SPACE' (U+0020)</li>
          <li>Contained double-quote characters must be escaped as \&quot;</li>
          <li>Contained back-slash characters must be escaped as \\</li>
          <li>Contained forward-slash characters may be optionally escaped as \/</li>
          <li>Contained Unicode characters may be optionally escaped \u<span clas