fix: Don't pass anything if word match is empty

lua/telescope/builtin.lua

@@ -345,7 +345,7 @@ builtin.grep_string = function(opts)
   local search = opts.search or vim.fn.expand("<cword>")
 
   opts.entry_maker = opts.entry_maker or make_entry.gen_from_vimgrep(opts)
-  opts.word_match = opts.word_match or ''
+  opts.word_match = opts.word_match or nil
 
   pickers.new(opts, {
     prompt = 'Find Word',

lua/telescope/pickers.lua

@@ -296,9 +296,8 @@ function Picker:find()
   -- TODO: We need to center this and make it prettier...
   local prompt_win, prompt_opts = popup.create('', popup_opts.prompt)
   local prompt_bufnr = a.nvim_win_get_buf(prompt_win)
-  a.nvim_win_set_option(prompt_win, 'winblend', self.window.winblend)
-
   a.nvim_win_set_option(prompt_win, 'winhl', 'Normal:TelescopeNormal')
+  a.nvim_win_set_option(prompt_win, 'winblend', self.window.winblend)
 
   -- a.nvim_buf_set_option(prompt_bufnr, 'buftype', 'prompt')
   -- vim.fn.prompt_setprompt(prompt_bufnr, prompt_string)