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    ('literal', 'abcdefg', [False, False, True])

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    ('re', 'a.+b', [False, False, True])

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    ('literal', 're:foobar', [False, True])

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    ('literal', 'foo:bar', [False, False, True])

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    ('re', 'A.+b', [False, False, True])

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    [False, False, True]

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    [False, False, True]

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    [False, True]

    case insensitive literal matches
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    'Foo Bar'
    >>> person(b'"Foo "buz" Bar" <foo@bar>')
    'Foo "buz" Bar'
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    >>> emails = [b'email@email.com']
    >>> _ismailmaplineinvalid(names, emails)
    True
    >>> # One email and one name passes
    >>> names = [b'Test Name']
    >>> _ismailmaplineinvalid(names, emails)
    False
    >>> # No names but two emails passes
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    ... b'<name@email.xx> <commit2@email.xx>',
    ... b'Name <proper@email.xx> <commit3@email.xx>',
    ... b'Name <proper@email.xx> Commit <commit4@email.xx>',
    ... ])
    >>> mm = parsemailmap(mmdata)
    >>> for key in sorted(mm.keys()):
    ...     print(key)
    mailmapping(email='commit1@email.xx', name=None)
    mailmapping(email='commit2@email.xx', name=None)
    mailmapping(email='commit3@email.xx', name=None)
    mailmapping(email='commit4@email.xx', name='Commit')
    >>> for val in sorted(mm.values()):
    ...     print(val)
    mailmapping(email='commit1@email.xx', name='Name')
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    ...     b'<name@email.xx> <commit2@email.xx>',
    ...     b'Name <proper@email.xx> <commit3@email.xx>',
    ...     b'Name <proper@email.xx> Commit <commit4@email.xx>',
    ... ])
    >>> m = parsemailmap(mmdata)
    >>> mapname(m, b'Commit <commit1@email.xx>')
    'Name <commit1@email.xx>'
    >>> mapname(m, b'Name <commit2@email.xx>')
    'Name <name@email.xx>'
    >>> mapname(m, b'Commit <commit3@email.xx>')
    'Name <proper@email.xx>'
    >>> mapname(m, b'Commit <commit4@email.xx>')
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    True
    >>> isauthorwellformed(b'Bad Author')
    False
    >>> isauthorwellformed(b'Bad Author <author@author.com')
    False
    >>> isauthorwellformed(b'Bad Author author@author.com')
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