pandoc-2.19.2: test/command/8236.md

```
% pandoc -f org -t native
  #+begin_src jupyter-python :session py :display plain
  import pandas as pd
  df = pd.read_csv('weight.csv', parse_dates=['Date'], index_col=0)
  #+end_src
^D
[ CodeBlock
    ( ""
    , [ "python" , "code" ]
    , [ ( "session" , "py" ) , ( "display" , "plain" ) ]
    )
    "import pandas as pd\ndf = pd.read_csv('weight.csv', parse_dates=['Date'], index_col=0)\n"
]
```