Merge pull request #25 from mike-allaway/patch-1

removed a semicolon that isn't needed

_episodes/03-learning.md

@@ -51,7 +51,7 @@ df['y_hat'] = [0, 2, 4, 6, 8]
 ax = df.plot(x='x', y='y', kind='scatter', xlim=[0,6], ylim=[-1,9])
 
 # plot approx line of best fit
-ax.plot(df['x'], df['y_hat'], color='blue');
+ax.plot(df['x'], df['y_hat'], color='blue')
 
 # plot error
 ax.vlines(x=df['x'], ymin=df['y'], ymax=df['y_hat'], color='red', linestyle='dashed')