docs: update code-style rule 2.24

This commit also updates existing code to use the new format.

refs #4681

Change-Id: I88e62a34fc55a69cd01d74e80a7000c6cf4d7c2d
diff --git a/src/security/v2/additional-description.hpp b/src/security/v2/additional-description.hpp
index 5e16132..16281f9 100644
--- a/src/security/v2/additional-description.hpp
+++ b/src/security/v2/additional-description.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2013-2017 Regents of the University of California.
+ * Copyright (c) 2013-2018 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -41,11 +41,7 @@
   class Error : public tlv::Error
   {
   public:
-    explicit
-    Error(const std::string& what)
-      : tlv::Error(what)
-    {
-    }
+    using tlv::Error::Error;
   };
 
   typedef std::map<std::string, std::string>::iterator iterator;