Multiple lines of pasted text that were copied from a code block will have a trailing back slash at the end of each line except the last

[chevas]

Describe the bug
Multiple lines of pasted text that were copied from a code block will have a trailing back slash at the end of each line except the last line

To Reproduce
This can be reproduced on the public implementation of Blocknote at blocknotejs.org

Create a code block.
Type in at least 2 lines of text
Select all the lines of text
Paste them in some other text editor, like notepad or whatever
Observe there are back slashes at the end of each line except the last line