doc: fix scripts and regenerate (#12506)

* Fix some small doc issues

* doc: fixup

* doc: fixup

* Fix lint and rebase

* Remove bad advice

* Ugh, stupid mpack files...

* Don't let people include these for now until they specifically want to

* Prevent duplicate tag

src/nvim/api/buffer.c

@@ -42,6 +42,8 @@
 
 /// \defgroup api-buffer
 ///
+/// \brief For more information on buffers, see |buffers|
+///
 /// Unloaded Buffers:~
 ///
 /// Buffers may be unloaded by the |:bunload| command or the buffer's

src/nvim/lua/vim.lua

@@ -255,6 +255,8 @@ function vim.schedule_wrap(cb)
   end)
 end
 
+--- <Docs described in |vim.empty_dict()| >
+--@private
 function vim.empty_dict()
   return setmetatable({}, vim._empty_dict_mt)
 end