It seems I cannot open with Neovim the files I have encrypted with Vim. Neovim just open the files without decrypting them, displaying all those gibberish character sequence.
Is it considered normal ? Is there a way around, or is it a bug ?
All support for cryptmethod
was removed in 85338fe
. See the linked pull requests for (lengthy) discussions about it. There is no way to open these files with Neovim. You will need to use Vim.