Fix newline formatting in terminal suggest details widget

[Copilot]

The terminal suggest details widget's explain mode displayed valueSelection and index fields on the same line due to an escaped newline literal (\\n) instead of an actual newline character (\n).

Changes

• Fixed line 145 in simpleSuggestWidgetDetails.ts to use \n instead of \\n when building the markdown string for explain mode details

Before:

md += `valueSelection: ${vs ? `[${vs[0]}, ${vs[1]}]` : 'undefined'}\\n`;

After:

md += `valueSelection: ${vs ? `[${vs[0]}, ${vs[1]}]` : 'undefined'}\n`;

This ensures proper line breaks in the rendered code block, matching the formatting of other fields (score, prefix, index).

Original prompt

---

This section details on the original issue you should resolve

<issue_title>terminal suggest details widget has formatting issue</issue_title>
<issue_description>There should be a newline between valueSelection and index

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes terminal suggest details widget has formatting issue #286583

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[meganrogge]

Works!

[Tyriar]

Even better pattern would be lines: string[] and .join('\n')

[Copilot]

Pull request overview

This PR fixes a formatting bug in the terminal suggest details widget's explain mode where the valueSelection field was displaying on the same line as the index field due to an escaped newline literal.

Key Change:

• Fixed line 145 in simpleSuggestWidgetDetails.ts to use \n instead of \\n for proper newline rendering