Document URL: 
https://access.redhat.com/documentation/en-us/red_hat_satellite/6.3/html/upgrading_and_updating_red_hat_satellite/upgrading_red_hat_satellite#upgrading_a_disconnected_satellite

Section Number and Name: 
2.3.2. Upgrading a Disconnected Satellite Server

Describe the issue: 
The section has the following note included: "To use the pre-upgrade script, ensure you have tfm-rubygem-katello-2.2.0.90-1-sat or later installed."
That is a note from 6.1→6.2 upgrade days, and is not relevant for 6.2→6.3 upgrades anymore, as that script is included since day 0. (6.2 ships with katello 3.0.z, not 2.2.z)

Suggestions for improvement: 
Remove that note/check/requirement, as it is always fulfilled.

Additional information: 
The package name would be ruby193-rubygem-katello on Satellite 6.1, it was moved to tfm- prefix in 6.2.