message: test: typescript: Initializers are not allowed in ambient contexts (https://stackoverflow.com/questions/26946495/what-means-ambient-in-typescript)
diff: @@ -273,7 +273,7 @@ const nodeMajorVersion = parseInt(process.versions.node, 10);
  check(["export interface S {", " i(j: string): boolean;", "}"]);
  - check(["declare namespace D3 {", " export const f: number = 2;", "}"]);
  + check(["declare namespace D3 {", " export const f: number;", "}"]);
  check(["declare function foo<K, V>(arg: T = getDefault()): R"]);
  