message: fix doc comment for assert_redirect_cached
diff: @@ -165,7 +165,8 @@ pub(crate) fn assert_redirect(path: &str, expected_target: &str, web: &TestFront
  Ok(())
  }
  -/// Make sure that a URL redirects to a specific page, and that the target exists and is not another redirect
  +/// Make sure that a URL redirects to a specific page, and that the target exists and is not another redirect.
  +/// Also verifies that the redirect's cache-control header matches the provided cache policy.
  #[context("expected redirect from {path} to {expected_target}")]
  pub(crate) fn assert_redirect_cached(
  path: &str,
  