code: def prettyMatcherList(things):
      
      norm = []
      for x in makeSequence(things):
          if hasattr(x, 'pattern'):
              norm.append(x.pattern)
          else:
              norm.append(x)
      return "('%s')" % "', '".join(norm)
docs: Try to construct a nicely-formatted string for a list of matcher
      objects. Those may be compiled regular expressions or strings...