# Description

As described in frictionlessdata#1660, the `stringified` attribute is not copied during the `to_copy()` as it is not included in the `metadata_profile_patch`.

This commit fixes it by adding it to the `metadata_profile_patch`.  This also inclues a unit test to verify the change.

# Tests

Ensure the new unit test detects the issue before the fix:

```
> pytest frictionless/formats/excel/__spec__/test_control.py::test_excel_control_to_copy

[...]

>       assert control_copy == control_with_changed_attributes
E       AssertionError: assert {'type': 'exc...tError': True} == {'type': 'exc...tError': True}
E
E         Omitting 8 identical items, use -vv to show
E         Differing attributes:
E         ['stringified']
E
E         Drill down into differing attribute stringified:
E           stringified: False != True

frictionless/formats/excel/__spec__/test_control.py:25: AssertionError
```

Ensure the unit test runs and passes after the fix:

```
> pytest frictionless/formats/excel/__spec__/test_control.py::test_excel_control_to_copy -v

[...]

frictionless/formats/excel/__spec__/test_control.py::test_excel_control_to_copy PASSED [100%]
```

…action with schema

- fixes ExcelControl(stringified=True) documentation could clarify interaction with schemas frictionlessdata#1659