docs: def write(self):
          """This actually runs the qvality program from PATH."""
          outfn = self.create_outfilepath(self.fn, self.outsuffix)
          command = ['qvality']
          command.extend(self.qvalityoptions)
          command.extend([self.scores['target']['fn'], self.scores['decoy']['fn'],
                          '-o', outfn])
          subprocess.call(command)