These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.65 s (backtrack: 0/20).

[ebuild     U  ] virtual/editor-0-r8::gentoo [0-r7::gentoo] 0 KiB
[ebuild  N     ] app-editors/vim-classic-core-8.3.0::gentoo  USE="acl nls -minimal -verify-sig" 14422 KiB
[uninstall     ] app-editors/vim-core-9.1.1652-r3::gentoo  USE="acl nls -minimal" 
[blocks b      ] app-editors/vim-core ("app-editors/vim-core" is soft blocking app-editors/vim-classic-core-8.3.0)

Total: 2 packages (1 upgrade, 1 new, 1 uninstall), Size of downloads: 14422 KiB
Conflict: 1 block (all satisfied)