feat: show buffer number

nvim/lua/plugins.lua

@@ -44,7 +44,10 @@ return require('packer').startup(function(use)
         config = function()
             require'tabline'.setup {
                 enable = true,
-                options = {show_filename_only = true}
+                options = {
+                    show_bufnr = true,
+                    show_filename_only = true,
+                }
             }
         end,
         requires = {