Hong Kong’s top court has been asked to abolish an “extraordinary” and “inexplicable” law prohibiting calls to boycott the city’s “patriots-only” elections on the grounds that it violates residents’ rights to express disapproval of the political system and to make informed decisions before voting. A government senior counsel opposed the challenge by former Chinese University of Hong Kong student union president Jacky So Tsun-fung, arguing the law fell outside the scope of constitutional review....