title: How to avoid bad indentation when copy lines to Jupiter notebook?
body: <pre><code>print('L1 embedding ...')
      l1_reduced_emb = reducer.fit_transform(l1_emb_sample)
      # reduced representation
      print(l1_reduced_emb.shape, y_pred_sample_products.shape)
  </code></pre>
  <p>For example, when I copy 4 lines from a python file to a notebook, only the first line format is right. All other lines below should be aligned with the first line, but they are indented as shown.</p>
  <p>How to keep the original format when copying to notebook?</p>