WelcometothesecondeditionofProGit.Thefirsteditionwaspublishedoverfouryearsagonow.Sincethenalothaschangedandyetmanyimportantthingshavenot.WhilemostofthecorecommandsandconceptsarestillvalidtodayastheGitcoreteamisprettyfantasticatkeepingthingsbackwardcompatible,therehavebeensom