Neovim's new merge behavior for list tables breaks the way configurations are merged with the defaults

[kmoschcau]

Description

Neovim's new merging behavior for list like table breaks how the configuration for some things in lspconfig works. For example instead of using the user provided filetypes property as-is, it is now merged with the default element by element. For example take stylelint_lsp's filetypes:

{
  "css",
  "less",
  "scss",
  "sugarss",
  "vue",
  "wxss",
  "javascript",
  "javascriptreact",
  "typescript",
  "typescriptreact"
 }

If I now want to remove everything from javascript onwards and add svelte, I have to provide a config like this:

  filetypes = {
    "css",
    "less",
    "scss",
    "sugarss",
    "vue",
    "wxss",
    "svelte",
    "",
    "",
    "",
  },

The way these configurations for lists are merged need to be fixed.

[justinmk]

what "new merge behavior" are you referring to? provide a reference, ideally an exact commit.

there was a tbl_deep_extend change for a few days on Nvim HEAD, that was reverted: https://github.com/neovim/neovim/pull/30309

[kmoschcau]

That was it. I only vaguely remembered reading it in the news.txt changes, but wasn't able to find it in my own version. Turns out my neovim version seems to be stuck on a version that had the original change but not the removal. I'm closing this.