---

This section details on the original issue you should resolve

<issue_title>Formatter prints empty string for boolean with false value</issue_title>
<issue_description>## Bug Report

• Yes, I reviewed the contribution guidelines.
• Yes, more specifically, I reviewed the guidelines on how to write clear bug reports.

The following code prints the following output:

$formatter = new \WP_CLI\Formatter($assocArgs, [
    'id',
    'status',
]);

$entries = [
    [
        'id' => 1,
        'status' => true,
    ],
    [
        'id' => 2,
        'status' => false,
    ]
];

$iterator = \WP_CLI\Utils\iterator_map(
    $entries,
    function (array $entry) {
        return $entry;
    }
);

$formatter->display_items($iterator);

Output:

+----+--------+
| id | status |
+----+--------+
| 1  | 1      |
| 2  |        |
+----+--------+

I would have expected something like:

+----+--------+
| id | status |
+----+--------+
| 1  | 1      |
| 2  | 0      |
+----+--------+

or even better:

+----+--------+
| id | status |
+----+--------+
| 1  | true   |
| 2  | false  |
+----+--------+

I tried something like this to change the output, but the problem is that I would still like a boolean if I output a json with --format=json.

$iterator = \WP_CLI\Utils\iterator_map(
    $entries,
    function (array $entry) {
        $entry['status'] = $entry['status'] ? 'true' : 'false';

        return $entry;
    }
);
```</issue_description>

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