fix: handle tab control character in notebook output

[cosmo-grant]

📝 Summary

Handle \t control character in notebook output.

Fixes #7266.

🔍 Description of Changes

Details in linked issue.

After this change:

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

I have read the CLA Document and I hereby sign the CLA.

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Project	Deployment	Preview	Comments	Updated (UTC)
marimo-docs	Ready	Preview	Comment	Nov 24, 2025 3:06pm

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[mscolnick]

@cosmo-grant thanks for the contribution! this looks right to me, i started to look at the solution and this is where i landed as well

[cosmo-grant]

I have read the CLA Document and I hereby sign the CLA

[cosmo-grant]

recheck

[mscolnick]

thank you!