[Console] Document `CommandTester::assertCommandIsSuccessful()` usage#15479

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OskarStark merged 1 commit intosymfony:5.4from

yoannrenard:commandTester_assertCommandIsSuccessful_method_usage

Jul 15, 2021

Commits on Jul 4, 2021

[Console] Document CommandTester::assertCommandIsSuccessful() usage
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