[WIP]Fix stackTraceFilter

[iakio]

I found stackTraceFilter did not work on Windows.

C:\Users\ishida\src\test>node_modules\.bin\mocha --version
2.5.3

C:\Users\ishida\src\test>node_modules\.bin\mocha


  a
    1) b


  0 passing (21ms)
  1 failing

  1) a b:

      AssertionError: false == true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (C:\Users\ishida\src\test\test\mytest.js:5:9)
      at callFn (C:\Users\ishida\src\test\node_modules\mocha\lib\runnable.js:326:21)
      at Test.Runnable.run (C:\Users\ishida\src\test\node_modules\mocha\lib\runnable.js:319:7)
      at Runner.runTest (C:\Users\ishida\src\test\node_modules\mocha\lib\runner.js:422:10)
      at C:\Users\ishida\src\test\node_modules\mocha\lib\runner.js:528:12
      at next (C:\Users\ishida\src\test\node_modules\mocha\lib\runner.js:342:14)
      at C:\Users\ishida\src\test\node_modules\mocha\lib\runner.js:352:7
      at next (C:\Users\ishida\src\test\node_modules\mocha\lib\runner.js:284:14)
      at Immediate._onImmediate (C:\Users\ishida\src\test\node_modules\mocha\lib\runner.js:320:5)

This patch will fix this:

C:\Users\ishida\src\test>node_modules\.bin\mocha


  a
    1) b


  0 passing (27ms)
  1 failing

  1) a b:

      AssertionError: false == true
      + expected - actual

      -false
      +true

      at Context.<anonymous> (test\mytest.js:5:9)

But this patch break some test. Please give me some advice.

[boneskull]

@iakio Thanks. I'm going to close this, but I can address this issue for you here quickly, I believe.