WordPress at a glance
action is not described

wp_enqueue_editor action-hook . WP 3.9.0

Fires when scripts and styles are enqueued for the editor.

Usage

add_action( 'wp_enqueue_editor', 'action_function_name_406' );
function action_function_name_406( $to_load ){
	// action...
}
$to_load(array)
An array containing boolean values whether TinyMCE and Quicktags are being loaded.

Where the hook is called

_WP_Editors::enqueue_scripts()
wp-includes/class-wp-editor.php 787-790
do_action( 'wp_enqueue_editor', array(
	'tinymce'   => ( $default_scripts || self::$has_tinymce ),
	'quicktags' => ( $default_scripts || self::$has_quicktags ),
) );

Where the hook is used (in WP core)

Does not used.