some missed changes for pep8 conventions (#685)

Author: AnjuJoon

source/rst/wald_friedman.rst

@@ -608,8 +608,14 @@ and plot these on our value function plot
 
         # The cutoff points can be found by differencing these costs with
         # The Bellman equation (J is always less than or equal to p_c_i)
-        β = π_grid[np.searchsorted(payoff_f1 - np.minimum(h, payoff_f0), 1e-10) - 1]
-        α = π_grid[np.searchsorted(np.minimum(h, payoff_f1) - payoff_f0, 1e-10) - 1]
+        β = π_grid[np.searchsorted(
+                                  payoff_f1 - np.minimum(h, payoff_f0),
+                                  1e-10)
+                   - 1]
+        α = π_grid[np.searchsorted(
+                                  np.minimum(h, payoff_f1) - payoff_f0,
+                                  1e-10)
+                   - 1]
 
         return (β, α)