The report that Rudy Giuliani has turned a corner in his battle with pneumonia and is breathing on his own in a Florida hospital is certainly worth cheering. “Just yesterday he was in critical condition, so I’m incredibly grateful to share that he is now conscious, off the ventilator, and even cracking jokes,” his son Andrew told The Post on Tuesday. It was separately reported that his condition was so serious when he arrived at the hospital that a priest had given him last rites . Almost as remarkable as his improvement is the enormous outpouring of well wishers, with even Mayor Mamdani joining the chorus. “I think he is someone that we as New Yorkers know well. And he’s been a fixture in our city’s politics and public life for so many years. And I know that many New Yorkers are concerned by the reports that he’s in critical condition, and so we do keep him and his family in our prayers at this time,” Mamdani said. Bravo, Mr. Mayor.…