That’s one explanation for how Indian tycoon Gautam Adani’s $2.5 billion share sale scraped through. No doubt the heavy lifting was done by a $400 million check from Abu Dhabi. But that was along expected lines — the Middle East royals have backed Adani in the past, too. The bigger surprise is how the other uber-rich came to the last-minute defense of their compatriot in the crosshairs of an American short seller.