[BUG] Code block copy adds trailing newline causing >> in PowerShell

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?

copying a single-line command from a code block in the VS Code extension adds a trailing newline, which PowerShell interprets as a continuation prompt

What Should Happen?

Copying a single-line command from a code block should copy only the command text, without a trailing newline, so it executes immediately when pasted into PowerShell without triggering the >> continuation prompt.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code VS Code extension
2. Ask Claude for a PowerShell command - it responds with a fenced code block containing a single line
3. Click the copy button on the code block
4. Paste into a PowerShell terminal (Windows PowerShell 5.1)
5. The command appears followed by >> on the next line, indicating PowerShell received a trailing newline and is waiting for more input,

6.User must press Enter again to execute

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.281

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_