代码快展示第一行多出一个空格

[yorunning]

• [x] I confirm that this is an issue rather than a question.

Bug report

What is actually happening?

Other relevant information

• Your OS:
• Node.js version:
• VuePress version: 2.0.bate.51
• VuePress-theme-reco version:2.0.bate.41
• Which package manager did you use for the install(npm/cnpm/yarn/pnpm)?

[Undertone0809]

So actually what happen? I don't understand.