docs-bug(Card): Testing with MatCardHarness Example

[lukaszprus]

Documentation Feedback

What's the point of ?? [] in

components/src/components-examples/material/card/card-harness/card-harness-example.spec.ts

Line 34 in 04d3b63

const footerSubcomponents = (await card.getAllHarnesses(MatButtonHarness)) ?? [];

?

Seems like it can be removed

Affected documentation page

https://material.angular.io/components/card/examples#card-harness

[crisbeto]

Agreed, I don't think it's necessary.

[MichelleRetroRabbit]

If no one is already working on it, I would like to do this change.

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