message: Fix test incorrectly validating CARGO_PKG_LICENSE_FILE.
diff: @@ -1303,7 +1303,7 @@ fn crate_env_vars() {
  repository = "https://example.com/repo.git"
  authors = ["wycats@example.com"]
  license = "MIT OR Apache-2.0"
  - license_file = "license.txt"
  + license-file = "license.txt"
  [[bin]]
  name = "foo-bar"
  @@ -1344,6 +1344,7 @@ fn crate_env_vars() {
  assert_eq!("https://example.com", HOMEPAGE);
  assert_eq!("https://example.com/repo.git", REPOSITORY);
  assert_eq!("MIT OR Apache-2.0", LICENSE);
  + assert_eq!("license.txt", LICENSE_FILE);
  assert_eq!("This is foo", DESCRIPTION);
  let s = format!("{}.{}.{}-{}", VERSION_MAJOR,
  VERSION_MINOR, VERSION_PATCH, VERSION_PRE);
  