code: func (s *RepositoriesService) GetRelease(ctx context.Context, owner, repo string, id int64) (*RepositoryRelease, *Response, error) {
  	u := fmt.Sprintf("repos/%s/%s/releases/%d", owner, repo, id)
  	return s.getSingleRelease(ctx, u)
  }
docs: // GetRelease fetches a single release.
  //
  // GitHub API docs: https://developer.github.com/v3/repos/releases/#get-a-single-release