Make help page for cli for marimo new look nicer on 80 character wide…

[Rowlando13]

… terminals.

📝 Summary

Help page for marimo new --help looks nicer on 80 character wide terminals. Issue has before and after.

Closes #9614

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✅ Merge Checklist

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• Tests have been added for the changes made.

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	May 21, 2026 5:09am

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[cubic-dev-ai]

No issues found across 1 file

Architecture diagram

sequenceDiagram
    participant User
    participant CLI as CLI (marimo _cli/cli.py)
    participant Shell as Terminal (80-col width)
    
    Note over User,Shell: CLI help page generation for "marimo new"
    
    User->>CLI: Run "marimo new --help"
    CLI->>CLI: Build new_help_msg string
    Note over CLI: Assembles bullet list with _key_value_bullets()
    CLI->>CLI: Split bullets into two groups
    Note over CLI: First group: common usage (create notebook, file-based prompt)
    CLI->>CLI: Second group: less common usage (quoted prompt)
    CLI->>CLI: Join groups with newline separators
    CLI->>Shell: Output formatted help text
    Shell-->>User: Display rendered help (single-column bullet list)
    
    Note over CLI,Shell: Key constraint: terminal width of 80 characters
    Note over CLI: Bullets are rearranged to prevent overflow beyond 80 cols

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[Rowlando13]

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

[Rowlando13]

@akshayka PR is ready.

[akshayka]

LGTM, thanks!

[github-actions]

🚀 Development release published. You may be able to view the changes at https://marimo.app?v=0.23.7-dev78