Documentation formatting broken

[BlackHC]

See https://www.tensorflow.org/api_docs/python/tf/contrib/copy_graph/copy_op_to_graph (source code formatting leaks into general text)
or https://www.tensorflow.org/api_docs/python/tf/contrib/graph_editor/copy (Returns: and Raises: get folded into parameters).

Either the doc generator needs to understand python doc comments better or the doc comments need to be updated to work better with markdown (extra newlines etc). What do you think?

Thanks,
Andreas

[drpngx]

@josh11b @martinwicke for docs