message: test(pkgid): scheme must be explicit named
diff: @@ -38,12 +38,9 @@ impl PackageIdSpec {
  /// use cargo::core::PackageIdSpec;
  ///
  /// let specs = vec![
  + /// "https://crates.io/foo",
  /// "https://crates.io/foo#1.2.3",
  /// "https://crates.io/foo#bar:1.2.3",
  - /// "crates.io/foo",
  - /// "crates.io/foo#1.2.3",
  - /// "crates.io/foo#bar",
  - /// "crates.io/foo#bar:1.2.3",
  /// "foo",
  /// "foo:1.2.3",
  /// ];
  