Why I use version control

git status

On branch master
Your branch is up-to-date with 'origin/master'.
Changes not staged for commit:
  (use "git add ..." to update what will be committed)
  (use "git checkout -- ..." to discard changes in working directory)

        modified: inclass_t_test2.pg

no changes added to commit (use "git add" and/or "git commit -a")

git checkout -- inclass_t_test2.pg
git status

On branch master
Your branch is up-to-date with 'origin/master'.
nothing to commit, working directory clean