Restore non-wildcard /arrayB/id test assertion for backward compatibility

[Copilot]

The switch from /arrayB/id to /arrayB/*/id in the csvSimple test left the original non-wildcard array traversal path untested, removing regression coverage for existing behavior.

Changes

• JFlatTest.java: Re-adds the /arrayB/id assertion alongside the new /arrayB/*/id wildcard assertion, so both paths are explicitly verified to produce identical results:

// Non-wildcard (backward compatibility)
assertEquals(
    "[0]/arrayB[0]/id;\n...[1]/arrayB[2]/id;\n",
    simple.toCSV("/arrayB/id", null, null).toString()
);
// Wildcard (new feature)
assertEquals(
    "[0]/arrayB[0]/id;\n...[1]/arrayB[2]/id;\n",
    simple.toCSV("/arrayB/*/id", null, null).toString()
);

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