COLOMBO — There were men in the hall on the morning of 29 July who have spent much of the past decade attacking one another in public. Ali Sabry, justice and then foreign minister under Gotabaya Rajapaksa. Udaya Gammanpila, a minister of the same period who has fought much of Colombo’s political class in court and on air. M.A. Sumanthiran of the Ilankai Thamil Arasu Katchi, who spent a career litigating against the governments the other two sat in. And Lal Wijenayake, of the National People’s Po