code: def include(self):
          
          if len(self.pending) == 0 or not self.pending[0].startswith('include '):
              return
          name = self.pending.pop(0)[8:].strip()[1:-1]
          for b in [os.path.dirname(self.name)] + self.inc_dirs:
              pname = os.path.abspath(os.path.expanduser(os.path.join(b, name)))
              if os.path.isfile(pname):
                  name = pname
                  break
          else:
              raise Exception('Can not find include file "{}".'.format(name))
          self.pending = list(FortranReader(name, self.docmark, self.predocmark, 
                                            self.docmark_alt, self.predocmark_alt,
                                            self.fixed, self.length_limit,
                                            inc_dirs=self.inc_dirs)) + self.pending
docs: If the next line is an include statement, inserts the contents
          of the included file into the pending buffer.