Is “The official history narrates the succession plainly, while the novel forcibly attaches the folk legend of his name change to Ling.” true?

Similarly recorded, the 'History of Song: Biography of Yang Ye' only states plainly, 'When Taizong campaigned against Taiyuan, he had long heard of his name and once sought to obtain him.' But in 'The Generals of the Yang Family, Chapter 5', it becomes 'Because he followed his mother's临终遗命, his younger brother Jin Wang Guangyi entered to serve, and she entrusted him with these words: "I observe that you walk like a dragon and step like a tiger; in the future you will surely be a peaceful emperor." This is clearly a forced attachment of a folk tale.'