CodeMirror is broken when viewing data

[tomzhou1213]

Issue description

路由、上游、服务等所有查看数据的地方都出现这个问题

Expected behavior

正常显示数据

How to Reproduce

无

Screenshots

Environment

• apisix version 2.9.0
• OS : cncentOS 7
• OpenResty version : 1.19.9.1
• etcd version: 3.4.7
• apisix-dashboard version: 2.9.0
• Browser version: Google Chrome 69.0.3497.92（正式版本） （32 位）

Additional context

No response

[guoqqqi]

@barchielAbyss Do you have time to help check this issue?

[mLiGuangYuan]

@barchielAbyss Do you have time to help check this issue?

yep，I'm checking it

[barchielAbyss]

@tomzhou1213

hi, Could you please tell me how you installed Google Chrome 69.0.3497.92? I want to simulate your environment accurately, but I found that this problem cannot be see in the later version of 89.x

[barchielAbyss]

@tomzhou1213

hi, Could you please tell me how you installed Google Chrome 69.0.3497.92? I want to simulate your environment accurately, but I found that this problem cannot be see in the later version of 89.x

I've used a lot of search engines, and they all point to the wrong download address

[barchielAbyss]

I find download's in here

@tomzhou1213 hi, Could you please tell me how you installed Google Chrome 69.0.3497.92? I want to simulate your environment accurately, but I found that this problem cannot be see in the later version of 89.x

I've used a lot of search engines, and they all point to the wrong download address