docs: update supertab recipe to faithfully implement supertab functionality

Author: theol0403

lua/recipes.lua

@@ -26,6 +26,11 @@ return {
 
       local cmp = require("cmp")
 
+      opts.preselect = cmp.PreselectMode.None
+      opts.completion = {
+        completeopt = "menu,menuone,noinsert,noselect",
+      }
+
       opts.mapping = vim.tbl_extend("force", opts.mapping, {
         ["<Tab>"] = cmp.mapping(function(fallback)
           if cmp.visible() then
@@ -52,6 +57,17 @@ return {
             fallback()
           end
         end, { "i", "s" }),
+        ["<CR>"] = cmp.mapping({
+          i = function(fallback)
+            if cmp.visible() and cmp.get_active_entry() then
+              cmp.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = false })
+            else
+              fallback()
+            end
+          end,
+          s = cmp.mapping.confirm({ select = true }),
+          c = cmp.mapping.confirm({ behavior = cmp.ConfirmBehavior.Replace, select = true }),
+        }),
       })
     end,
   },