title: How get the sequences properly indented with ruamel.yaml?
body: <p>With the following data</p>
  
  <pre><code>from ruamel import yaml
  data = {1: {1:[{1:1,2:2},{1:1,2:2}], 2:2}, 2: 42}
  </code></pre>
  
  <p>I get an incorrect indentation for the sequence</p>
  
  <pre><code>&gt;&gt;&gt; print yaml.round_trip_dump(data)
  1:
    1:
    - 1: 1
      2: 2
    - 1: 1
      2: 2
    2: 2
  2: 42
  </code></pre>
  
  <p>Which cannot be folded on Notepad++. However with the proper indent it works:</p>
  
  <p>Bad:</p>
  
  <p><a href="https://i.stack.imgur.com/KYFB8.png" rel="noreferrer"><img src="https://i.stack.imgur.com/KYFB8.png" alt="Bad Indent"></a></p>
  
  <p>Good: </p>
  
  <p><a href="https://i.stack.imgur.com/KXv5S.png" rel="noreferrer"><img src="https://i.stack.imgur.com/KXv5S.png" alt="Good Indent"></a></p>
  
  <p>I have tried to use <code>block_seq_indent=2</code>:</p>
  
  <pre><code>&gt;&gt;&gt; print yaml.round_trip_dump(data, block_seq_indent=2)
  1:
    1:
      - 1: 1
      2: 2
      - 1: 1
      2: 2
    2: 2
  2: 42
  </code></pre>
  
  <p>How can I solve this issue?</p>