How can I remove linenos from the copied text?

[zhyantao]

Describe the problem

I am using is sphinx_book_theme.

When I try to use copy button to copy the text, however, the linenos also included.

I just want to use linenos to view the line numbers, and I don’t want them to be copied to the clipboard.

Thank you so much~

Steps to reproduce

For example: website

And this is my conf.py.

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[choldgraf]

This is going to be fixed in #138