Recommended configuration for lua_ls causes issues

[jecaro]

Description

One of the options recommended for lua_ls causes issues when working on one own neovim configuration.

nvim-lspconfig/doc/server_configurations.md

Lines 6361 to 6362 in 74e1480

	-- or pull in all of 'runtimepath'. NOTE: this is a lot slower
	-- library = vim.api.nvim_get_runtime_file("", true)

The problem is that nvim_get_runtime_file returns all neovim runtime directories, including the user config itself. Then when working on one own neovim config, lua_ls sees it kind of twice and outputs a lot of wrong duplicated fields warnings ([duplicate-doc-field]). I suspect this is this issue.

Removing those two directories from the runtime path, makes the issue disappear:

-- lua language server is super confused when editing lua files in the config
-- and raises a lot of [duplicate-doc-field] warnings
local runtime_files = vim.api.nvim_get_runtime_file("", true)
for k, v in ipairs(runtime_files) do
  if v == "/home/my-login/.config/nvim/after" or v == "/home/my-login/.config/nvim" then
    table.remove(runtime_files, k)
  end
end

...

-- library = vim.api.nvim_get_runtime_file("", true) 
library = runtime_files