Fix an issue where the generated ~/.config/nvim/init.lua lacks a newline after the vim.cmd [[source ...]] directive. Without this newline, subsequent lua configuration is concatenated onto the same line, breaking lua syntax.
init.lua Before:
vim.cmd [[source /nix/store/...]]vim.opt.rtp:prepend(...)
After:
vim.cmd [[source /nix/store/...]]
vim.opt.rtp:prepend(...)
