message: Fix typo in `unicode_encode` documentation.
diff: @@ -63,7 +63,7 @@ def unicode_encode(input,
  #### Example:
  ```python
  >>> input = [[71, 246, 246, 100, 110, 105, 103, 104, 116], [128522]]
  - >>> unicode_encode(input, 'UTF8')
  + >>> unicode_encode(input, 'UTF-8')
  ['G\xc3\xb6\xc3\xb6dnight', '\xf0\x9f\x98\x8a']
  ```
  """
  