mix test failed using the current master branch of elixir

[matsubara0507]

current master brunch is https://github.com/elixir-lang/elixir/tree/fba7e5c240b114a5edcc52ec6f438f9d20dcd29f

~/exfmt# mix test
Compiling 14 files (.ex)
Generated exfmt app
.................

  1) doctest Exfmt.Algebra.group/1 (8) (Exfmt.AlgebraTest)
     test/exfmt/algebra_test.exs:3
     Doctest failed
     code: Inspect.Algebra.format(doc, 6) === ["Hello,", "\n", "A", " ", "B"]
     left: ["Hello,", "\n", "A", "\n", "B"]
     stacktrace:
       lib/exfmt/algebra.ex:355: Exfmt.Algebra (module)

.

  2) doctest Exfmt.Algebra.nest/2 (9) (Exfmt.AlgebraTest)
     test/exfmt/algebra_test.exs:3
     Doctest failed
     code: doc = Inspect.Algebra.nest(Inspect.Algebra.glue("hello", "world"), 5)
            Inspect.Algebra.format(doc, 5) === ["hello", "\n     ", "world"]
     left: ["hello", " ", "world"]
     stacktrace:
       lib/exfmt/algebra.ex:326: Exfmt.Algebra (module)

.

  3) doctest Exfmt.Algebra.surround/3 (10) (Exfmt.AlgebraTest)
     test/exfmt/algebra_test.exs:3
     Doctest failed
     code: doc = Inspect.Algebra.surround("[", Inspect.Algebra.glue("a", "b"), "]")
            Inspect.Algebra.format(doc, 3) === ["[", "a", "\n ", "b", "]"]
     left: ["[", "a", " ", "b", "]"]
     stacktrace:
       lib/exfmt/algebra.ex:392: Exfmt.Algebra (module)

.........

  4) doctest Exfmt.Algebra.break/2 (2) (Exfmt.AlgebraTest)
     test/exfmt/algebra_test.exs:3
     Doctest failed
     code: break = Inspect.Algebra.break("\t")
            doc = Inspect.Algebra.concat([String.duplicate("a", 20), break, "b"])
            Inspect.Algebra.format(doc, 10) === ["aaaaaaaaaaaaaaaaaaaa", "\n", "b"]
     left: ["aaaaaaaaaaaaaaaaaaaa", "\t", "b"]
     stacktrace:
       lib/exfmt/algebra.ex:166: Exfmt.Algebra (module)

............................................................

  5) test heredoc with preceeding spaces (Exfmt.Integration.BinaryTest)
     test/exfmt/integration/binary_test.exs:108
     Assertion with == failed
     code:  assert expected == output
     left:  "\"\"\"\none\n  two\n\"\"\"\n"
     right: "\"one\\n  two\\n\"\n"
     stacktrace:
       test/exfmt/integration/binary_test.exs:109: (test)

........

  6) test 2 line heredoc (Exfmt.Integration.BinaryTest)
     test/exfmt/integration/binary_test.exs:104
     Assertion with == failed
     code:  assert expected == output
     left:  "\"\"\"\none\ntwo\n\"\"\"\n"
     right: "\"one\\ntwo\\n\"\n"
     stacktrace:
       test/exfmt/integration/binary_test.exs:105: (test)



  7) test empty heredoc (Exfmt.Integration.BinaryTest)
     test/exfmt/integration/binary_test.exs:96
     Assertion with == failed
     code:  assert expected == output
     left:  "\"\"\"\n\"\"\"\n"
     right: "\"\"\n"
     stacktrace:
       test/exfmt/integration/binary_test.exs:97: (test)

...

  8) test 1 line heredoc (Exfmt.Integration.BinaryTest)
     test/exfmt/integration/binary_test.exs:100
     Assertion with == failed
     code:  assert expected == output
     left:  "\"\"\"\none\n\"\"\"\n"
     right: "\"one\\n\"\n"
     stacktrace:
       test/exfmt/integration/binary_test.exs:101: (test)

..................................................................................................................................

  9) test comments (Exfmt.Integration.CommentsTest)
     test/exfmt/integration/comments_test.exs:5
     Assertion with == failed
     code:  assert expected == output
     left:  "# Hello\n"
     right: "__block__()\n# Hello\n"
     stacktrace:
       test/exfmt/integration/comments_test.exs:8: (test)

..................

 10) test chars (Exfmt.Integration.BasicsTest)
     test/exfmt/integration/basics_test.exs:80
     Assertion with == failed
     code:  assert expected == output
     left:  "?a\n"
     right: "97\n"
     stacktrace:
       test/exfmt/integration/basics_test.exs:81: (test)

.................

 11) test comments within list (Exfmt.Integration.BasicsTest)
     test/exfmt/integration/basics_test.exs:379
     Assertion with == failed
     code:  assert expected == output
     left:  "[\n  :one_one_one,\n  # hi\n  :two_two_two,\n]\n"
     right: "[:one_one_one, :two_two_two]\n# hi\n"
     stacktrace:
       test/exfmt/integration/basics_test.exs:380: (test)

............

Finished in 1.7 seconds
33 doctests, 256 tests, 11 failures, 2 skipped

Randomized with seed 806669