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/http-malware-host.nse

@@ -13,7 +13,7 @@ http://blog.unmaskparasites.com/2009/09/11/dynamic-dns-and-botnet-of-zombie-web-
 This is done by requesting the page <code>/ts/in.cgi?open2</code> and
 looking for an errant 302 (it attempts to detect servers that always
 return 302). Thanks to Denis from the above link for finding this
-technique! 
+technique!
 ]]
 
 ---
@@ -23,10 +23,10 @@ technique!
 -- 80/tcp   open  http       syn-ack
 -- |_ http-malware-host: Host appears to be clean
 -- 8080/tcp open  http-proxy syn-ack
--- |  http-malware-host: 
+-- |  http-malware-host:
 -- |  |  Host appears to be infected (/ts/in.cgi?open2 redirects to http://last-another-life.ru:8080/index.php)
 -- |_ |_ See: http://blog.unmaskparasites.com/2009/09/11/dynamic-dns-and-botnet-of-zombie-web-servers/
--- 
+--
 
 author = "Ron Bowes"
 
@@ -54,7 +54,7 @@ action = function(host, port)
 		stdnse.print_debug(1, "%s: Exiting due to ambiguous response from web server on %s:%s. All URIs return status 200.", SCRIPT_NAME, host.ip, port.number)
 		return false
 	end
-  
+
 	-- Perform a GET request on the file
 	result = http.get_url("http://" .. host.ip .. ":" .. port.number .. "/ts/in.cgi?open2")
 	if(not(result)) then