Correct one line spacing.

python/exercises.tex

@@ -139,6 +139,7 @@ Lambda functions:
 
 
 \Chapter{Exception handling}
+
 Write a program that reads a number from a file and then devides 100 by this number.
 \begin{enumerate}[label=\textbf{\alph*)}]
         \item Try opening a non-existent file. Make sure you understand what happens.
@@ -184,6 +185,7 @@ Write a program that reads a number from a file and then devides 100 by this num
 \Chapter{Plots and Histograms}
 \begin{enumerate}[label=\textbf{\alph*)}]
     \item Plot an histogramm with the distribution of births per month from exercise \ref{Dictionaries}.\ref{3}.
+        \Hint{Use the \texttt{pyplot.hist} function from the module \texttt{matplotlib}.}
 \end{enumerate}
 
 \end{document}