Fix python test-packer

[kalbasit]

Over on nixpkgs, I noticed the build for js-beautify is failing after we've updated from 1.7.5 to 1.8.6. In 1.8.0rc2, python/jsbeautifier/tests/test-packer.py was added, pytest is not liking the name test_str. It complains about not finding the str fixture.

$ cd python
$ nix run '(with import <nixpkgs> {}; python36.withPackages(ps: with ps; [ setuptools pytest ]))' -c python setup.py test
running test
Searching for editorconfig>=0.12.0
Best match: EditorConfig 0.12.2
Processing EditorConfig-0.12.2-py3.6.egg

Using /yl/code/opensource/base/src/github.com/beautify-web/js-beautify/python/.eggs/EditorConfig-0.12.2-py3.6.egg
running egg_info
writing jsbeautifier.egg-info/PKG-INFO
writing dependency_links to jsbeautifier.egg-info/dependency_links.txt
writing entry points to jsbeautifier.egg-info/entry_points.txt
writing requirements to jsbeautifier.egg-info/requires.txt
writing top-level names to jsbeautifier.egg-info/top_level.txt
reading manifest file 'jsbeautifier.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching 'js-beautify'
writing manifest file 'jsbeautifier.egg-info/SOURCES.txt'
running build_ext
================================================================================================================ test session starts ================================================================================================================
platform linux -- Python 3.6.8, pytest-3.7.4, py-1.5.4, pluggy-0.7.1
rootdir: /yl/code/opensource/base/src/github.com/beautify-web/js-beautify/python, inifile:
collected 3 items

jsbeautifier/tests/testindentation.py ..                                                                                                                                                                                                      [ 66%]
jsbeautifier/tests/test-packer.py E                                                                                                                                                                                                           [100%]

====================================================================================================================== ERRORS =======================================================================================================================
____________________________________________________________________________________________________________ ERROR at setup of test_str _____________________________________________________________________________________________________________
file /yl/code/opensource/base/src/github.com/beautify-web/js-beautify/python/jsbeautifier/tests/test-packer.py, line 11
  def test_str(str, expected):
E       fixture 'str' not found
>       available fixtures: cache, capfd, capfdbinary, caplog, capsys, capsysbinary, doctest_namespace, monkeypatch, pytestconfig, record_property, record_xml_attribute, record_xml_property, recwarn, tmpdir, tmpdir_factory
>       use 'pytest --fixtures [testpath]' for help on them.

/yl/code/opensource/base/src/github.com/beautify-web/js-beautify/python/jsbeautifier/tests/test-packer.py:11
========================================================================================================= 2 passed, 1 error in 0.05 seconds =========================================================================================================

[flokli]

Added this patch on top of our package derivation in nixpkgs, can confirm it fixes the issue. Would love to see this merged, so we can stop applying patches on top of the latest release :-)

[bitwiseman]

@flokli @kalbasit
Thanks for the PR.

[bitwiseman]

@kalbasit @flokli
Turns out that file shouldn't even be there. 😄

[kalbasit]

@bitwiseman thank you for taking care of this one.