Fix typo in grammar.

Add lexertl.

inc/lexertl/compile_assert.hpp

@@ -0,0 +1,24 @@
+// compile_assert.hpp
+// Copyright (c) 2010-2012 Ben Hanson (http://www.benhanson.net/)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file licence_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef LEXERTL_COMPILE_ASSERT_H
+#define LEXERTL_COMPILE_ASSERT_H
+
+namespace lexertl
+{
+// Named template param for compiler compatibility
+template<bool b>
+struct compile_assert;
+
+// enum for compiler compatibility
+template<>
+struct compile_assert<true>
+{
+    enum {value = 1};
+};
+}
+
+#endif