improve make_grid docstring (pytorch#227)

* DOC fixed typo in make_grid argument name

* DOC document "padding" make_grid argument

Author: kmike

torchvision/utils.py

@@ -10,16 +10,17 @@ def make_grid(tensor, nrow=8, padding=2,
     Args:
         tensor (Tensor or list): 4D mini-batch Tensor of shape (B x C x H x W)
             or a list of images all of the same size.
-        nrows (int, optional): Number of rows in grid. Final grid size is
+        nrow (int, optional): Number of rows in grid. Final grid size is
             (B / nrow, nrow). Default is 8.
+        padding (int, optional): amount of padding. Default is 2.
         normalize (bool, optional): If True, shift the image to the range (0, 1),
             by subtracting the minimum and dividing by the maximum pixel value.
         range (tuple, optional): tuple (min, max) where min and max are numbers,
             then these numbers are used to normalize the image. By default, min and max
             are computed from the tensor.
-        scale_each(bool, optional): If True, scale each image in the batch of
+        scale_each (bool, optional): If True, scale each image in the batch of
             images separately rather than the (min, max) over all images.
-        pad_value(float, optional): Value for the padded pixels.
+        pad_value (float, optional): Value for the padded pixels.
 
     Example:
         See this notebook `here <https://gist.github.com/anonymous/bf16430f7750c023141c562f3e9f2a91>`_