The postupgrade-en.txt contains: ==== Note: Make sure $wgDBadminusr and $wgDBadminpassword is set in your ==== The variables are however interpreted by portage, and in the end they are displayed as empty strings: ==== Note: Make sure and is set in your ==== Please escape them with a backslash so they are printed, as they are part of the documentation, and should not be interpreted. Report is after seeing this in the upgrade to 1.19.2, but I got annoyed by this in many earlier upgrades (although not annoyed enough to report).
Fixed in CVS.