fixed msftidy.rb complains

Author: h0ng10

modules/exploits/multi/http/eaton_nsm_code_exec.rb

@@ -79,11 +79,11 @@ def read_credentials()
 		print_status("Reading user credentials from the database")
 		response = execute_php_code(php)
 
-        if not response or response.code != 200 then
-            print_error("Failed: Error requesting page")
+		if not response or response.code != 200 then
+			print_error("Failed: Error requesting page")
 			return
 		end
-		
+
 		credentials = response.body.to_s.scan(/\d{10}(.*)\d{10}(.*)\d{10}/)
 
 		return if credentials.length == 0