Fix accidental /// comments and a docs typo (#64287)

## Objective

Fix small comment/docs typos left out of #64282.

## Solution

- Replace accidental Rust-style `///` comments with `//` in
`assets/settings/default.json` (`git_panel.tree_view` and
`git.gutter_debounce`)
- Fix typo in `docs/src/visual-customization.md`:
`"enable_language_server" if false` ? `is false`

## Testing

Comment/docs-only changes; no runtime behavior change.

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Release Notes:

- N/A

Co-authored-by: Cursor <cursoragent@cursor.com>
95c0d74be9Ashraf Hossain committed on 9/16/2026, 8:53:40 AM· committed by GitHubparent55a43c2
2 files changedLine totals unavailable