message: In the line 240, the string 'conv_3' miss the %d
  I think the author missed the '%d' to name the related net scope, so the correct code is :
  net = slim.conv2d(net, 256, [3, 3], scope='conv3_%d' % (i+1)) NOT net = slim.conv2d(net, 256, [3, 3], scope='conv3_' % (i+1))
diff: @@ -237,7 +237,7 @@ One way to reduce this code duplication would be via a `for` loop:
  ```python
  net = ...
  for i in range(3):
  - net = slim.conv2d(net, 256, [3, 3], scope='conv3_' % (i+1))
  + net = slim.conv2d(net, 256, [3, 3], scope='conv3_%d' % (i+1))
  net = slim.max_pool2d(net, [2, 2], scope='pool2')
  ```
  