Fix to prevent assigning to locals

suggest-require.lua

@@ -82,7 +82,8 @@ local function package_config ()
     }
 end
 
-local iterate_files_in_subfiles = function (...)
+local iterate_files_in_subfiles
+function iterate_files_in_subfiles (...)
     -- This outer function is a wrapper, that lazily loads the correct
     -- version of the iterate function, based on the availability of
     -- the commands.