3If you are familiar with git concepts, you may want to know this: The authors of the art-workbook follow the convention that they make a new git branch for every release of art-workbook and the name of the branch matches the version number of art-workbook. In the current example, the local working environment knows about two branches, the develop branch and the branch for version v0_00_13. The develop branch is the name of the branch that always contains the most recent art-workbook code.