Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [=================================== FAILURES ===================================
_______________________________ test_style_defs ________________________________
]: [test_style_defs failed during the test run]
=============
[>           assert expect_line in style_str
E           AssertionError: assert '.o { color: #666666 } /* Operator */' in 'pre { line-height: 125%; }\ntd.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; pa...e.Instance */\n.vm { color: #19177C } /* Name.Variable.Magic */\n.il { color: #666 } /* Literal.Number.Integer.Long */'

]: [Assertion error in the test failed. The test checks if expect_line, whose value is '.o { color: #666666 } /* Operator */' is in the style_str. It isn't, hence the assertion fails.]
=============
[        # Check that a sample of the styles are present
        # (use only a sample to make the test more robust
        # against Pygments changes).]: [The test tests features related to Pygments library.]

Issue: A new version of pygments has probably changed generated output of the css files. The test looks for a specific string in the file content and doesn't find it. This causes test to fail.
Resolution: The source code of the package should be updated to incorporate changes happening in the new pygments version.