Fix some files so it passes flake8

prototype.py

@@ -2,16 +2,19 @@
 import numpy as np
 import scipy.integrate
 
+
 def dose(t, X):
     return X
 
+
 def rhs(t, y, Q_p1, V_c, V_p1, CL, X):
     q_c, q_p1 = y
     transition = Q_p1 * (q_c / V_c - q_p1 / V_p1)
     dqc_dt = dose(t, X) - q_c / V_c * CL - transition
     dqp1_dt = transition
     return [dqc_dt, dqp1_dt]
 
+
 model1_args = {
     'name': 'model1',
     'Q_p1': 1.0,

setup.py

@@ -8,10 +8,11 @@ def get_version():
     """
     Get version number from the pkmodel module.
 
-    The easiest way would be to just ``import pkmodel ``, but note that this may
-    fail if the dependencies have not been installed yet. Instead, we've put
-    the version number in a simple version_info module, that we'll import here
-    by temporarily adding the oxrse directory to the pythonpath using sys.path.
+    The easiest way would be to just ``import pkmodel ``, but note that this
+    may fail if the dependencies have not been installed yet. Instead, we've
+    put the version number in a simple version_info module, that we'll import
+    here by temporarily adding the oxrse directory to the pythonpath using
+    sys.path.
     """
     import os
     import sys