[BUG] extra new lines in /context usage graph

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

In Claude Code v2.1.85 and all later versions, extra new lines that make no sense was added to the /context usage graph:

<img width="800" height="960" alt="Image" src="https://github.com/user-attachments/assets/0cb6e826-b84e-481f-9b7c-46291e3bc35b" />

What Should Happen?

In Claude Code v2.1.84 and all earlier versions:

<img width="800" height="960" alt="Image" src="https://github.com/user-attachments/assets/a91c056a-a716-4fa4-95cb-e169fdd23178" />

Error Messages/Logs

Steps to Reproduce

/context

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.84

Claude Code Version

2.1.85+

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_