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/snmp-win32-software.nse

@@ -11,7 +11,7 @@ Attempts to enumerate installed software through SNMP.
 
 ---
 -- @output
--- | snmp-win32-software:  
+-- | snmp-win32-software:
 -- |   Apache Tomcat 5.5 (remove only); 2007-09-15 15:13:18
 -- |   Microsoft Internationalized Domain Names Mitigation APIs; 2007-09-15 15:13:18
 -- |   Security Update for Windows Media Player (KB911564); 2007-09-15 15:13:18
@@ -39,13 +39,13 @@ portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
 -- @param oid string containing the object id for which the value should be extracted
 -- @return value of relevant type or nil if oid was not found
 function get_value_from_table( tbl, oid )
-	
+
 	for _, v in ipairs( tbl ) do
 		if v.oid == oid then
 			return v.value
 		end
 	end
-	
+
 	return nil
 end
 
@@ -54,30 +54,30 @@ end
 -- @param tbl table containing <code>oid</code> and <code>value</code>
 -- @return table suitable for <code>stdnse.format_output</code>
 function process_answer( tbl )
-	
+
 	local sw_name = "1.3.6.1.2.1.25.6.3.1.2"
 	local sw_date = "1.3.6.1.2.1.25.6.3.1.5"
 	local new_tbl = {}
-	
+
 	for _, v in ipairs( tbl ) do
-		
+
 		if ( v.oid:match("^" .. sw_name) ) then
-			local objid = v.oid:gsub( "^" .. sw_name, sw_date) 
+			local objid = v.oid:gsub( "^" .. sw_name, sw_date)
 			local install_date = get_value_from_table( tbl, objid )
 			local sw_item
-			
+
 			local _, year, month, day, hour, min, sec = bin.unpack( ">SCCCCC", install_date )
-			install_date = ("%02d-%02d-%02d %02d:%02d:%02d"):format( year, month, day, hour, min, sec )	
+			install_date = ("%02d-%02d-%02d %02d:%02d:%02d"):format( year, month, day, hour, min, sec )
 
 			sw_item = ("%s; %s"):format(v.value ,install_date)
 			table.insert( new_tbl, sw_item )
 		end
-	
+
 	end
-	
+
 	table.sort( new_tbl )
 	return new_tbl
-	
+
 end
 
 
@@ -85,21 +85,21 @@ action = function(host, port)
 
 	local socket = nmap.new_socket()
 	local catch = function() socket:close()	end
-	local try = nmap.new_try(catch)	
+	local try = nmap.new_try(catch)
 	local data, snmpoid = nil, "1.3.6.1.2.1.25.6.3.1"
 	local sw = {}
 	local status
 
 	socket:set_timeout(5000)
 	try(socket:connect(host, port))
-	
+
 	status, sw = snmp.snmpWalk( socket, snmpoid )
 	socket:close()
 
 	if ( not(status) ) or ( sw == nil ) or ( #sw == 0 ) then
 		return
 	end
-		
+
 	sw = process_answer( sw )
 
 	nmap.set_port_state(host, port, "open")