code: def _fix_evidence_text(txt):
      
      txt = re.sub('[ ]?\( xref \)', '', txt)
      # This is to make [ xref ] become [] to match the two readers
      txt = re.sub('\[ xref \]', '[]', txt)
      txt = re.sub('[\(]?XREF_BIBR[\)]?[,]?', '', txt)
      txt = re.sub('[\(]?XREF_FIG[\)]?[,]?', '', txt)
      txt = re.sub('[\(]?XREF_SUPPLEMENT[\)]?[,]?', '', txt)
      txt = txt.strip()
      return txt
docs: Eliminate some symbols to have cleaner supporting text.