message: updated according to review.
diff: @@ -5539,8 +5539,8 @@ def generate_bounding_box_proposals(scores,
  Args:
  scores: A 4-D float `Tensor` of shape `[num_images, height, width, num_achors]`
  containing scores of the boxes for given anchors, can be unsorted.
  - bbox_deltas: A 4-D float `Tensor` of shape `[num_images, height, width, 4 x num_anchors]`.
  - encoding boxes with respec to each anchor. Coordinates are given in the form `[dy, dx, dh, dw]`.
  + bbox_deltas: A 4-D float `Tensor` of shape `[num_images, height, width, 4 x num_anchors]`
  + encoding boxes with respect to each anchor. Coordinates are given in the form `[dy, dx, dh, dw]`.
  image_info: A 2-D float `Tensor` of shape `[num_images, 5]` containing image information Height, Width, Scale.
  anchors: A 2-D float `Tensor` of shape `[num_anchors, 4]` describing the anchor boxes.
  Boxes are formatted in the form `[y1, x1, y2, x2]`.
  