child_process: add `subprocess.readLines` method
Similarly to fileHandle.readLines(), iterating line by line over the output of a command is a somewhat regular thing when writing scripts. This PR adds a util method to cover this use case.
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Do not update/delete: Notification broadcast message test data
Similarly to fileHandle.readLines(), iterating line by line over the output of a command is a somewhat regular thing when writing scripts. This PR adds a util method to cover this use case.