1 decimal point for disp in title

examples/distributions_by_method_2D.py

@@ -142,7 +142,7 @@ def simulate_batch(n_cands):
 title += f'{human_format(n_voters)} voters, '
 title += f'{human_format(n_cands)} candidates'
 title += f', both {cand_dist}'
-title += f', {disp} disp'
+title += f', {disp:.1f} disp'
 
 # Load from .pkl file if it exists
 pkl_filename = title + '.pkl'