Problem:  Unknown key mappings listed in substitute confirm message.
Solution: Include hints as to what the key mappings do.

closes: vim/vim#16144

https://github.com/vim/vim/commit/336fb22eaef7977741712d0c4735fc6d65428a4f

Problem:
Noise in stderr from src/nvim/po/CMakeLists.txt during build:

    48 substitutions on 48 lines
    "optwin.js" "optwin.js" 1299L, 57582B written
    385 substitutions on 385 lines
    "nvim.pot" "nvim.pot" 9318L, 180177B written

Solution:
Run with `-c silent source` instead of `-S`.

Problem:
The message E325 displays “vim -r” to recover the file.

Solution:
Change the message to display “nvim -r” instead of “vim -r”.

Problem:  spell completion message still wrong in translations
          (after 9.1.0512)
Solution: Update translation files with the new message
          (Kyle Kovacs)

closes: vim/vim#15113

https://github.com/vim/vim/commit/68f5ceddca2ec2d591b9180020c95bb86bf6d3d2

Co-authored-by: Kyle Kovacs <kkovacs@diconfiberoptics.com>

Co-authored-by: ite-usagi <77563904+ite-usagi@users.noreply.github.com>
Co-authored-by: v-sim <56476039+v-sim@users.noreply.github.com>
Co-authored-by: Evgeni Chasnovski <evgeni.chasnovski@gmail.com>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Co-authored-by: Quico Augustijn <quico.public@gmail.com>
Co-authored-by: nhld <nahnera@gmail.com>
Co-authored-by: francisco souza <108725+fsouza@users.noreply.github.com>