Searching for `.git/` in file paths incorrectly matched directory names
ending with `.git` (e.g., `personal.git/cheat/hello`), causing sheets
under such paths to be silently skipped. Fix by requiring the path
separator on both sides (`/.git/`), so `.git` is only matched as a
complete path component.
Rewrites test suite with comprehensive coverage for all six documented
edge cases, including the #711 scenario and combination cases (e.g.,
a real .git directory inside a .git-suffixed parent).
Closes#711
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Refactor `installer.clone` into new `repo.Clone` package and method.
- Refactor `sheets.isGitDir` into `repo.GitDir`.
Both of these changes read better, and will facilitate cleaner
architecture when `--update` is implemented.
