message: Update Tensor wording for Tensor extended slicing documentation.
diff: @@ -555,11 +555,11 @@ def _slice_helper(tensor, slice_spec, var=None):
  Some useful examples:
  ```python
  - # strip leading and trailing 2 elements
  + # Strip leading and trailing 2 elements
  foo = tf.constant([1,2,3,4,5,6])
  print(foo[2:-2].eval()) # => [3,4]
  - # skip every row and reverse every column
  + # Skip every other row and reverse the order of the columns
  foo = tf.constant([[1,2,3], [4,5,6], [7,8,9]])
  print(foo[::2,::-1].eval()) # => [[3,2,1], [9,8,7]]
  @@ -579,7 +579,7 @@ def _slice_helper(tensor, slice_spec, var=None):
  print(foo[tf.newaxis, ...].eval()) # => [[[1,2,3], [4,5,6], [7,8,9]]]
  print(foo[tf.newaxis].eval()) # => [[[1,2,3], [4,5,6], [7,8,9]]]
  - # masks
  + # Masks
  foo = tf.constant([[1,2,3], [4,5,6], [7,8,9]])
  print(foo[foo > 2].eval()) # => [3, 4, 5, 6, 7, 8, 9]
  ```
  