It was curious, the sling encasing Joe Budden’s right arm on Wednesday night at the Canal Room — curious and uncommented upon. For a rapper so given to transmitting even the mundane details of his life to fans, the omission was notable. Skip to next paragraph Blog ArtsBeat The latest on the arts, coverage of live events, critical reviews, multimedia extravaganzas and much more. Join the discussion. More Arts News Less than a week earlier Mr. Budden had posted a video online in which he held a compress to his right temple. “My eye’s swollen,” he noted, and he complained about pain in his shoulder. The reason? He had just been attacked by Raekwon and his entourage, he said, the latest in a string of incidents in what had been until that point a war of words with various members of the Wu-Tang Clan . On Wednesday night both Mr. Budden and Raekwon performed in New York — Raekwon in a Staten Island park and Mr. Budden with his group...