Issue 4970 - Document the library API of python-abp

tests/test_parser.py

 # This file is part of Adblock Plus <https://adblockplus.org/>,
 # Copyright (C) 2006-2017 eyeo GmbH
 #
 # Adblock Plus is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 3 as
 # published by the Free Software Foundation.
 #
 # Adblock Plus is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ skipping 84 matching lines @@
     },
     '#?#:-abp-properties(|background-image: url(data:*))': {
         'selector': {
             'type': ST.XCSS,
             'value': ':-abp-properties(|background-image: url(data:*))'
         },
         'options': [],
     },
 }.items())
 def test_parse_filters(filter_text, expected):
-    """Parametric test for filter parsing"""
+    """Parametric test for filter parsing."""
     parsed = parse_line(filter_text)
     assert parsed.type == 'filter'
     assert parsed.text == filter_text
     for attribute, expected_value in expected.items():
         assert getattr(parsed, attribute) == expected_value
 
 
 def test_parse_comment():
     line = parse_line('! Block foo')
     assert line.type == 'comment'
@@ skipping 37 matching lines @@
 def test_parse_filterlist():
     result = parse_filterlist(['! foo', '! Title: bar'])
     assert list(result) == [Comment('foo'), Metadata('Title', 'bar')]
 
 
 def test_exception_timing():
     result = parse_filterlist(['! good line', '%bad line%'])
     assert next(result) == Comment('good line')
     with pytest.raises(ParseError):
         next(result)