Fix year range in libstdc++v3/testsuite/.../empty.cc copyright header

libstdc++-v3/ChangeLog:

        * testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
        Fix year range in copyright header.

From-SVN: r267504

libstdc++-v3/ChangeLog

+2019-01-02  Joel Brobecker  <brobecker@adacore.com>
+
+	* testsuite/21_strings/basic_string_view/element_access/char/empty.cc:
+	Fix year range in copyright header.
+
 2019-01-01  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.

libstdc++-v3/testsuite/21_strings/basic_string_view/element_access/char/empty.cc

 // { dg-options "-std=gnu++17" }
 
-// Copyright (C) 3 Free Software Foundation, Inc.
+// Copyright (C) 2013-2019 Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
 // software; you can redistribute it and/or modify it under the