turn fancy spell suggest ui into a lambda, and fix some styling

lua/conf/binds.lua

@@ -41,13 +41,13 @@ map('n', ']]', '<cmd>tabn<CR>')
 
 -- good spell suggestion ui
 -- (stolen from https://github.com/neovim/neovim/pull/25833)
+vim.keymap.set('n', 'z=', function()
   local spell_on_choice = vim.schedule_wrap(function(_, idx)
     if type(idx) == 'number' then
       vim.cmd('normal! '..idx..'z=')
     end
   end)
 
-local spellsuggest_select = function()
   if vim.v.count > 0 then
     spell_on_choice(nil, vim.v.count)
     return
@@ -55,6 +55,4 @@ local spellsuggest_select = function()
   local cword = vim.fn.expand('<cword>')
   local prompt = 'Change '..vim.inspect(cword)..' to:'
   vim.ui.select(vim.fn.spellsuggest(cword, vim.o.lines), { prompt = prompt }, spell_on_choice)
-end
-
-vim.keymap.set('n', 'z=', spellsuggest_select, { desc = 'Shows spelling suggestions' })
+end, { desc = 'Shows spelling suggestions' })