List: refactor documentation

example/list/take_until.cpp

@@ -0,0 +1,22 @@
+/*
+@copyright Louis Dionne 2014
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+ */
+
+#include <boost/hana/detail/static_assert.hpp>
+#include <boost/hana/ext/std/integral_constant.hpp>
+#include <boost/hana/functional.hpp>
+#include <boost/hana/integer_list.hpp>
+#include <boost/hana/integral.hpp>
+using namespace boost::hana;
+using namespace literals;
+
+
+int main() {
+    //! [main]
+    BOOST_HANA_STATIC_ASSERT(
+        take_until(_ < 2_c, integer_list<int, 3, 2, 1, 0>) == integer_list<int, 3, 2>
+    );
+    //! [main]
+}