fix indentations in ROI calculation

jmclient/jmclient/wallet_utils.py

@@ -630,8 +630,7 @@ def wallet_fetch_history(wallet, options):
         def f(r, deposits, deposit_times, now, final_balance):
             return np.sum(np.exp((now - deposit_times) / 60.0 / 60 / 24 /
                 365)**r * deposits) - final_balance
-            r = brentq(f, a=1, b=-1, args=(deposits, deposit_times, now,
-                balance))
+        r = brentq(f, a=1, b=-1, args=(deposits, deposit_times, now, balance))
         print('continuously compounded equivalent annual interest rate = ' +
               str(r * 100) + ' %')
         print('(as if yield generator was a bank account)')