Remove trailing whitespace in lua files

Whitespace is not significant, so this should not be a problem.
https://secwiki.org/w/Nmap/Code_Standards

scripts/ncp-enum-users.nse

@@ -12,7 +12,7 @@ Retrieves a list of all eDirectory users from the Novell NetWare Core Protocol (
 --@output
 -- PORT    STATE SERVICE REASON
 -- 524/tcp open  ncp     syn-ack
--- | ncp-enum-users: 
+-- | ncp-enum-users:
 -- |   CN=admin.O=cqure
 -- |   CN=cawi.OU=finance.O=cqure
 -- |   CN=linux-l84tadmin.O=cqure
@@ -42,9 +42,9 @@ action = function(host, port)
 
 	status, resp = helper:search("[Root]", "User", "*")
 	if ( not(status) ) then	return stdnse.format_output(false, resp) end
-	
+
 	local output = {}
-	
+
 	for _, entry in ipairs(resp) do
 		table.insert(output, entry.name)
 	end