Keep a spawn spelling out of the helper guard

The detector test's near-miss sample spelled a bare binary spawn,
which spawn_env_hygiene's raw-spawn scan reads as a real one and
fails test-release and coverage. Use a plain binary() call instead.

Assisted-by: Claude Code:claude-opus-5-5

Author: claude

crates/socket-patch-cli/tests/cli/shared_helper_copies.rs

@@ -163,7 +163,7 @@ fn the_detector_sees_every_former_copy_shape() {
     }
     for not_a_copy in [
         "use common::{binary, git_sha256};",
-        "let out = Command::new(binary()).output();",
+        "let bin = binary();",
         "pub fn git_sha256_file(path: &Path) -> String {",
     ] {
         assert!(