format_on_save not work with the list of filetypes

[Ivan Isekeev]

format_on_save does not rocognize list, i.e any list means true for all file types.
I looked into this issue and got good result neovim/neovim#18617

local config = {lsp = {format_on_save={'*.ts','*.html','*.lua'}}}

if config.lsp.format_on_save then
    vim.api.nvim_create_autocmd('BufWritePre', {
        pattern = config.lsp.format_on_save,
        callback = function()
            vim.lsp.buf.format({
                timeout_ms = config.lsp.format_timeout,
                -- check user config to see if we can format on save
                filter = function(client)
                    if config.lsp.can_client_format(client.name) then
                        return client.name
                    end
                end,
            })
        end,
        group = group,
        nested = true,
    })
end