I just brought up the current 'amdX86' installation page and went to the set up disk section. I noted that the 'mkfs.ext2', 'mkfs.ext4', mkswap and swapon commands are not correct. The devices are not identified. As I go through the pages and sections of the current documentations, I will add to the discrepancies.
Most likely related to https://bugs.gentoo.org/show_bug.cgi?id=595992. Wiki team, please merge if they are the same underlying issue.
*** This bug has been marked as a duplicate of bug 595992 ***