message: Update __init__.py
  Add Python formatting for TF website
diff: @@ -54,6 +54,7 @@ underscores.
  Just as an example, consider the following "before" and "after" code snippets:
  +```python
  # Before
  def add_activation_summaries(v, scope):
  tf.scalar_summary("%s/fraction_of_zero" % scope, tf.nn.fraction_of_zero(v))
  @@ -63,6 +64,7 @@ def add_activation_summaries(v, scope):
  def add_activation_summaries(v):
  tf.summary.scalar("fraction_of_zero", tf.nn.fraction_of_zero(v))
  tf.summary.histogram("activations", v)
  +```
  Now, so long as the add_activation_summaries function is called from within the
  right name scope, the behavior is the same.
  