message: tests(help): Fix assertion by using the full line text
diff: @@ -338,8 +338,8 @@ fn explain() {
  fn z_flags_help() {
  assert_that(
  cargo_process().arg("-Z").arg("help"),
  - execs()
  - .with_status(0)
  - .with_stdout_contains("-Z unstable-options"),
  + execs().with_status(0).with_stdout_contains(
  + " -Z unstable-options -- Allow the usage of unstable options such as --registry",
  + ),
  );
  }
  