Method deleteLast

test/testtoken.cpp:577–585

    }

    void deleteLast() const {
        auto listEnds = std::make_shared<TokensFrontBack>();
        Token ** const tokensBack = &(listEnds->back);
        Token tok(list, listEnds);
        (void)tok.insertToken("aba");
        ASSERT_EQUALS(true, *tokensBack == tok.next());
        tok.deleteNext();
        ASSERT_EQUALS(true, *tokensBack == &tok);
    }

    void deleteFirst() const {
        auto listEnds = std::make_shared<TokensFrontBack>();