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by ben_straub 4253 days ago
A lot. (Coauthor here.)

Not every sentence was rewritten, but 4 years is a long time. There was a lot of content that was either inaccurate or out of date. We added content about two-way bridges and migration to other VCSes, graphical clients, shell integration, and lots more. There are also new chapters on GitHub and embedded Git (Libgit2 and JGit).