Export module output is different to API hook

Problem/Motivation

I noticed faulty behavior when using the Menu Block Export module (admin/config/user-interface/menu-block/export) to generate a MYMODULE_menu_block_blocks function for use in a custom module: All current 7.x versions generate export code that does not comply with the module's own API hook_menu_block_blocks (line 31 of menu_block.api.php).

This is generated by menu_block 7.x-2.5, 7.x-2.x and 7.x-3.x for a module named “custom” and random settings:

/**
 * Implements hook_menu_block_blocks().
 */
function custom_menu_block_blocks() {
  // The array key is the block delta used by menu block.
  return array(
    'custom-1' => array(
      'parent'      => main-menu:0,
      'title_link'  => 0,
      'admin_title' => 'whatever',
      'level'       => 2,
      'follow'      => '0',
      'depth'       => 2,
      'expanded'    => 1,
      'sort'        => 0,
    ),
  );
}

Using the code above in a custom module results in an error when I try to enable this module: parse error, expecting `')'' in custom.module

Proposed resolution

I compared the output to the API hook and it seems that the output should rather be:

function custom_menu_block_blocks() {
  // The array key is the block delta used by menu block.
  return array(
    'custom-1' => array(
      'menu_name'   => 'main-menu',
      'parent_mlid' => 0,
      'title_link'  => 0,
      'admin_title' => 'whatever',
      'level'       => 2,
      'follow'      => 0,
      'depth'       => 3,
      'expanded'    => 0,
      'sort'        => 0,
    ),
  );
}

Remaining tasks

Please review the attached patch.