tests: gate forward-slash+full-path test off Windows

Signed-off-by: SAY-5 <SAY-5@users.noreply.github.com>

On Windows the regex-over-full-path match uses `\`, so the
pattern `one/two/c` cannot match a real entry. The diagnostic-
didn't-fire behaviour this test pins is already covered by the
fact that the invocation does not error. Gate it to non-Windows
per tmccombs's CI feedback on the PR.

Author: SAY-5

tests/tests.rs

@@ -399,7 +399,14 @@ fn test_pattern_with_forward_slash_is_rejected() {
 /// --full-path is the user's explicit opt-in to regex-over-full-path matching,
 /// so a path-separation character in the pattern is expected and must not
 /// trigger the diagnostic.
+///
+/// Gated off Windows: the actual match is regex-over-the-full-path, so a
+/// forward-slash pattern only matches Unix-style paths. On Windows the OS
+/// uses `\` and `one/two/c` (as a literal regex) does not match a real
+/// entry — the behaviour this test is pinning (the diagnostic does not
+/// fire) is covered by the fact that the invocation does not error.
 #[test]
+#[cfg(not(windows))]
 fn test_pattern_with_forward_slash_allowed_with_full_path() {
     let te = TestEnv::new(DEFAULT_DIRS, DEFAULT_FILES);