message: Fix typos in README.
diff: @@ -65,8 +65,9 @@ keyword arguments to functions that had their arguments reordered.
  - The script assumes that `tensorflow` is imported using `import tensorflow as tf`.
  -- Note for upgrading to 2.0: Check out [tf2up.ml](http://tf2up.ml) for a convenient tool to upgrade Jupiter
  - notebooks and Python files in a github repository.
  +- Note for upgrading to 2.0: Check out [tf2up.ml](http://tf2up.ml) for a
  + convenient tool to upgrade Jupyter notebooks and Python files in a GitHub
  + repository.
  - Note for upgrading to 1.0: There are some syntaxes that are not handleable with this script as this
  script was designed to use only standard python packages.
  