Code copy button adds new line

[maxsitt]

Context

No response

Bug description

Currently, when copying code with the code copy button, a new line is automatically added when pasting the copied code somewhere else. This does not happen if the code is copied manually by selecting everything in the code block.

Especially when copying code that should be run in a Terminal/command prompt, the new line that is automatically added when copying the code with the code copy button can lead to problems in some cases, e.g. code is run immediately when pasting. Expected behaviour of the code copy button should be exactly the same as for copying code manually: copy only the content in the code block without adding a new line.

Related links

• Code copy button documentation
• Previously mentioned in Code copy button without adding new line #6323

Reproduction

9.4.8-code-copy-button.zip

Steps to reproduce

1. Create new mkdocs project with all required packages up to date (2023-11-13).
2. Add the code copy button feature to the mkdocs.yml:

   theme:
     name: material
     features:
     - content.code.copy
   

3. Add a code block in index.md.
4. From the served/built site, copy the code manually by selecting the content in the code block and paste it to an empty text document: no new line is added.
5. Copy the code with the code copy button: a new line is added.

Browser

No response

Before submitting

• I have read and followed the bug reporting guidelines.
• I have attached links to the documentation, and possibly related issues and discussions.
• I assure that I have removed all customizations before submitting this bug report.
• I have attached a .zip file with a minimal reproduction.

[squidfunk]

Thanks for reporting. Fixed in 34d789b. We now remove trailing whitespace when copying. We deliberately decided not to remove leading whitespace, as I'm not sure what the implications of that might be – there are just too many languages. Trailing whitespace should be fine, except for when you're doing tutorials in the language Whitespace, probably.

[maxsitt]

Thanks for the quick fix! :)

[squidfunk]

Released as part of 9.4.9.

[btbf]

I honestly did not want this to be fixed. Sometimes you want a line break at the end.
I would like to be able to set this option for each block.

[squidfunk]

I honestly did not want this to be fixed. Sometimes you want a line break at the end.

Well, thank you! Your comment clearly communicates: there are always different use cases. We cannot possibly please everyone, albeit we try so hard. Unfortunately, we're likely keeping it that way, as it's quite useful for the majority.