EditTable: customizing the input should allow row in parameters

[boxed]

I was trying to write documentation for EditTable:

@pytest.mark.django_db
def test_edit_table_attrs_on_field(small_discography):
    edit_table = EditTable(
        auto__model=Album,
        columns__year__field=dict(
            include=True,
            input__attrs__class__the_best_year=lambda row, **_: row.year == 1980,
        ),
        # edit_form__fields__year__input__attrs__class__the_best_year=lambda **_: 'the_best_year',

    )

    output = edit_table.bind(request=req('get')).render_to_response().content.decode()
    assert 'the_best_year' in output

But this unfortunately crashes with:

 AssertionError: Evaluating lambda found at: `input__attrs__class__the_best_year=lambda row, **_: row.year == 1980,` didn't resolve it into a value but strict mode was active, the signature doesn't match the given parameters. We had these arguments: request, user, table, traversable, form, instance, field, fragment

[boxed]

I was trying to add this to the docs:

def test_edit_tables_field_customization(big_discography):
    # language=rst
    """
    Field customization
    -------------------

    The `field` namespace on an `EditColumn` is an iommi `Field` instance, same as any normal `Form`, so can be customized in the same way:
    """

    # @test
    t = (
    # @end

    EditTable(
        auto__model=Album,
        page_size=10,
        columns__year__field=dict(
            include=True,
            attrs__placeholder='year',
            attrs__style__background='grey',
            attrs__class__foo=True,
        ),
    )

    # @test
    )

    show_output(t.bind(request=request))
    # @end