fix: depcrunch was using re.match where re.findall was what was wanted. Add a test.
// abi_prefix header -------------------------------------------------------//
// (c) Copyright John Maddock 2003
// Use, modification and distribution are subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt).
#ifndef BOOST_CONFIG_ABI_PREFIX_HPP
# define BOOST_CONFIG_ABI_PREFIX_HPP
#else
# error double inclusion of header boost/config/abi_prefix.hpp is an error
#endif
#include <boost/config.hpp>
// this must occur after all other includes and before any code appears:
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
#if defined( __BORLANDC__ )
#pragma nopushoptwarn
#endif