code: def gitmodule_report(self):
          
          fpath = self.relpath
          if fpath == '.':
              return
          yield '[submodule "%s"]' % fpath.replace(os.path.sep, '_')
          yield "    path = %s" % fpath
          yield "    url = %s" % self.remote_url
          yield ""
docs: Yields:
              str: .gitmodules configuration lines for this repository