cmp, get text from all buffers

lua/plugins/cmp.lua

@@ -93,7 +93,14 @@ return {
         { name = 'nvim_lsp' },
         { name = 'nvim_lsp_signature_help' },
         { name = 'luasnip' },
-        { name = 'buffer' },
+        {
+          name = 'buffer',
+          option = {
+            get_bufnrs = function()
+              return vim.api.nvim_list_bufs()
+            end,
+          },
+        },
         { name = 'path' },
       }),