Remove trailing whitespace in lua files

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

nselib/base64.lua

@@ -22,10 +22,10 @@ local b64table = {
 	'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
 	'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
 	'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
-	'w', 'x', 'y', 'z', '0', '1', '2', '3', 
+	'w', 'x', 'y', 'z', '0', '1', '2', '3',
 	'4', '5', '6', '7', '8', '9', '+', '/'
 	}
-	
+
 local b64dctable = {} -- efficency
 b64dctable['A'] = '000000'
 b64dctable['B'] = '000001'
@@ -95,7 +95,7 @@ b64dctable['/'] = '111111'
 
 local append = table.insert
 local substr = string.sub
-local bpack = bin.pack 
+local bpack = bin.pack
 local bunpack = bin.unpack
 local concat = table.concat
 
@@ -107,7 +107,7 @@ local function b64enc6bit(bits)
 	-- local byte
 	-- local _, byte = bunpack("C", bpack("B", "00" .. bits))
 	--
-	
+
 	-- more efficient, does the same (nb: add one to byte moved up one line):
 	local byte = tonumber(bits, 2) + 1
 	return b64table[byte]
@@ -146,7 +146,7 @@ function enc(bdata)
 		end
 	end
 	if #nbyte == 2 then
-		append(b64dataBuf, b64enc6bit(nbyte .. "0000") ) 
+		append(b64dataBuf, b64enc6bit(nbyte .. "0000") )
 		append(b64dataBuf, "==")
 	elseif #nbyte == 4 then
 		append(b64dataBuf, b64enc6bit(nbyte .. "00"))