text: non_ascii_function_identifier_name: {
      input: {
          function fooλ(δλ) {}
          function λ(δλ) {}
          (function λ(δλ) {})()
      }
      expect_exact: "function fooλ(δλ){}function λ(δλ){}(function λ(δλ){})();"
  }
  