Donald Trump arrived at the G7 summit in Evian-les-Bains brandishing what he called a fully signed peace deal with Iran, declaring the Strait of Hormuz would be "completely open" from Friday. Oil prices crashed below $80 a barrel on the news, giving India's import bill a much-needed breather. But the details are murkier than the president's confidence suggests. The deal remains a memorandum of understanding, not a final treaty, and...