deletions | additions       diff --git a/Version your code.tex b/Version your code.tex  index 0e74cb3..1d9eb1a 100644  --- a/Version your code.tex  +++ b/Version your code.tex 
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+# Removes samples with more than 5% missing data  \end{lstlisting}  As expected, this shows us the one line that we added to \verb|clean.py|. If we wanted to save this edit, we could add it to the staging area using \verb|git add| and then commit the change using \verb|git commit|, as we did above.  Instead, this time we'll restore the previous version of the file using the command \verb|git checkout|.  \begin{lstlisting}  $ git checkout -- clean.py  $ git diff  \end{lstlisting}  \verb|git diff| returns no output because \verb|git checkout| reverted \verb|clean.py| to the version in the last commit.