Improve border on markdown files
It looks good if border is removed on markdown files | **Now** | **Proposal** | **GitHub** | | ------ | ------ | ------ | | ![Now](/uploads/1a3715abcdad666e4330bf1c3f73e938/Now.png) | ![Proposal](/uploads/89f65d02cc172729c3bf99353f396ee2/Proposal.png) | ![GitHub](/uploads/8e7a643f3889fe4c7d0fb3da0c4b6dfe/GitHub.png) |
issue