tighten flake8, autopep8 to fix trailing whitespaces and blank lines with whitespaces (#87)

baselines/ddpg/memory.py

@@ -71,7 +71,7 @@ class Memory(object):
     def append(self, obs0, action, reward, obs1, terminal1, training=True):
         if not training:
             return
-        
+
         self.observations0.append(obs0)
         self.actions.append(action)
         self.rewards.append(reward)

baselines/ddpg/models.py

@@ -35,12 +35,12 @@ class Actor(Model):
             if self.layer_norm:
                 x = tc.layers.layer_norm(x, center=True, scale=True)
             x = tf.nn.relu(x)
-            
+
             x = tf.layers.dense(x, 64)
             if self.layer_norm:
                 x = tc.layers.layer_norm(x, center=True, scale=True)
             x = tf.nn.relu(x)
-            
+
             x = tf.layers.dense(x, self.nb_actions, kernel_initializer=tf.random_uniform_initializer(minval=-3e-3, maxval=3e-3))
             x = tf.nn.tanh(x)
         return x