przemo.

if ( WP_DEBUG && apply_filters( 'deprecated_constructor_trigger_error', true ) ) {
		if ( function_exists( '__' ) ) {
			if ( ! empty( $parent_class ) ) {
				/* translators: 1: PHP class name, 2: PHP parent class name, 3: version number, 4: __construct() method */
				trigger_error( sprintf( __( 'The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.' ),
					$class, $parent_class, $version, '
<pre>__construct()</pre>
' ) );
			} else {
				/* translators: 1: PHP class name, 2: version number, 3: __construct() method */
				trigger_error( sprintf( __( 'The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ),
					$class, $version, '
<pre>__construct()</pre>
' ) );
			}
		} else {
			if ( ! empty( $parent_class ) ) {
				trigger_error( sprintf( 'The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.',
					$class, $parent_class, $version, '
<pre>__construct()</pre>
' ) );
			} else {
				trigger_error( sprintf( 'The called constructor method for %1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.',
					$class, $version, '
<pre>__construct()</pre>
' ) );
			}
		}
	}

Line 3718:

$class, $parent_class, $version, '

<pre>__construct()</pre>
' ) );