message: Make minor style fix to eager guide (spacing between =).
diff: @@ -568,9 +568,8 @@ inserted during model construction. For example, to record summaries once every
  100 global steps:
  ```py
  +global_step = tf.train.get_or_create_global_step()
  writer = tf.contrib.summary.create_file_writer(logdir)
  -global_step=tf.train.get_or_create_global_step() # return global step var
  -
  writer.set_as_default()
  for _ in range(iterations):
  