Staging and Committing
Saving a snapshot takes two steps. First stage the files you want with git add. Then commit them with a message.
After git add, the file is under Changes to be committed. After the commit, the working tree is clean: nothing is waiting to be saved.
git add . stages everything in the folder at once. git commit -am "message" stages changes to already-tracked files and commits in one go.
What does `git add` do?
Start a repository, create readme.txt, stage it and commit it with the message "Add readme". Finish with git status, which should show a clean working tree. (Checked on the output of your last command.)
Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.
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