Improve block ref text copying

[TinkMingKing]

\ Process optimization

Is there an existing issue for this?

• I have searched the existing issues

Can the issue be reproduced with the default theme (daylight/midnight)?

• I was able to reproduce the issue with the default theme

Could the issue be due to extensions?

• I've ruled out the possibility that the extension is causing the problem.

Describe the problem

如果文档标题名为\,\\\,\\\\\，粘贴为引用块会产生问题

Expected result

fix

Screenshot or screen recording presentation

No response

Version environment

- Version: 3.0.14
- Operating System: win10
- Browser (if used):

Log file

none

More information

No response

[88250]

我这里测试似乎正常：

issue.webm

[TinkMingKing]

@88250 标题只有反斜杠的时候

[88250]

收到，稍后看下如何解决。