Why I use version control
Christophers-MacBook-Pro:t_test chris$ cp t_test3.pg inclass_t_test2.pg Oh, crap! I wanted to copy that to inclass_t_test3.pg, not overwrite inclass_t_test2.pg!
Christophers-MacBook-Pro:t_test chris$ 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") Christophers-MacBook-Pro:t_test chris$ git checkout -- inclass_t_test2.