Address gemini-code-assist review on PR #1744 (two MEDIUM):
- cmd detection used program.eq_ignore_ascii_case("cmd"), which fails
for a full path (C:\Windows\System32\cmd.exe) or a .exe suffix, so the
raw_arg quoting fix would not apply. Use Path::file_stem() instead
(fully-qualified std::path::Path -> no unused import off-Windows).
- Strengthen the Windows block of issue_1691_quoted_commit_message_round_trips
to assert argv content equals spec.args, not just arg count, so the
raw_arg payload (quotes preserved, no extra escaping) is actually
verified. sandbox/mod.rs already asserts content -- left untouched.
Windows paths are cfg-gated (compile-checked on macOS, executed on
Windows CI). macOS build + clippy clean.
Refs #1691.
Zhongyue Lin
0ce41505bc