Fix Hook_Formatter::format to accept WP_Hook object as argument

tests/Formatter/HookTest.php

@@ -58,5 +58,26 @@ class HookTest extends LapsTestCase {
 
 		$this->assertEquals( [], $formatter->format( [] ) );
 	}
-}
 
+	/**
+	 * @depends test__construct
+	 */
+	public function testFormatWpHook( Hook_Formatter $formatter ) {
+
+		if ( ! class_exists( 'WP_Hook' ) ) {
+			eval( 'class WP_Hook { public $callbacks = []; }' );
+		}
+
+		$wp_hook            = new \WP_Hook();
+		$wp_hook->callbacks = [
+			10 => [
+				[ 'function' => 'trim', 'accepted_args' => 1 ],
+			],
+		];
+
+		$result = $formatter->format( $wp_hook );
+
+		$this->assertIsArray( $result );
+		$this->assertEquals( [ 'trim' ], $result );
+	}
+}