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MUTANT / PRANG-0.17 / t / xml / invalid / 10-xmlns-attr.xml 
<!-- error: /invalid attribute 'quotation_dash' at .Octothorpe.section_mark.section_mark/ -->
<Octothorpe xmlns:A="uri:type:A" xmlns:C="uri:type:C">
  <colon/>
  <section_mark xmlns="uri:type:A" A:quotation_dash="blah">
    <section_mark quotation_dash="foo">
      baz
    </section_mark>
  </section_mark>
</Octothorpe>