Generally speaking, help tabs in core commonly follow one of the following three formats. Which should we use in a patch-making tutorial for the docs team?

example_help_tab.php

<?php

/**
 * Example format #1
 */
$example_string = '<p>' . __( 'This is some help text' ) . '</p>' . 
	'<p>' . __( 'This is some more help text' ) . '</p>';

get_current_screen()->add_help_tab( array(
	'id'		=> 'example',
	'title'		=> __( 'Example' ),
	'content'	=> $example_string
) );

/**
 * Example format #2
 */
$example_string = '<p>' . __( 'This is some help text' ) . '</p>';
$example_string .= '<p>' . __( 'This is some more help text' ) . '</p>';

get_current_screen()->add_help_tab( array(
	'id'		=> 'example',
	'title'		=> __( 'Example' ),
	'content'	=> $example_string
) );

/**
 * Example format #3
 */

get_current_screen()->add_help_tab( array(
	'id'		=> 'example',
	'title'		=> __( 'Example' ),
	'content'	=> '<p>' . __( 'This is some help text' ) . '</p>' .
	'<p>' . __( 'This is some more help text.' ) . '</p>'
) );