A man walks past a Twitter banner while leaving JP Morgan headquarters, before Twitter's IPO in New YorkWith the aid of John McCrank NEW YORK (Reuters) – The New York Inventory Change on Saturday did a test run of Twitter's highly expected market debut, as it seeks to keep away from the varieties of issues that plagued Fb's preliminary public offering on rival Nasdaq. The Giant Board, run by means of NYSE Euronext, often does programs trying out on the weekends, but this was once the primary time it had run a simulated IPO, and it did so at the request of its member companies – many of whom took part in Fb's 2012 IPO on Nasdaq OMX Staff's major exchange. …