docs: Update helpers.md (#1294)

* Remove racist example in docs/helpers.md

* Update helpers.md

Co-authored-by: 沈唁 <52o@qq52o.cn>

Doc Oliver committed 5y ago

13d4232f2d55e9c7f95c238d0cce3d956096e2db

Parent: 6f9baab

Committed by GitHub <noreply@github.com> on 7/20/2020, 7:11:53 AM