why user guide is not giving me the correct site?

When i am  using the search box in the 2.x user guide, site is set to site:codeigniter.com/user_guide/ which searches the 3.x guide.  The correct value for site should be site:codeigniter.com/userguide2/.

i am not able to understand what is happening here,omegle voojio please guide me into this?

Sorry, it seems the search box is not updated.

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper