pandoc/test/command/6948.md

Treat an image alone in its paragraph (but not a figure) as an independent image:

% pandoc -f native -t rst
[ Para
    [ Image
        ( "" , [ "align-center" ] , [] )
        [ Str "https://pandoc.org/diagram.jpg" ]
        ( "https://pandoc.org/diagram.jpg" , "" )
    ]
]
^D
.. image:: https://pandoc.org/diagram.jpg
   :alt: https://pandoc.org/diagram.jpg
   :align: center

Here we just omit the center attribute as it's not valid:

% pandoc -f native -t rst
[ Para
    [ Str "hi "
    , Image
        ( "" , [ "align-center" ] , [] )
        [ Str "https://pandoc.org/diagram.jpg" ]
        ( "https://pandoc.org/diagram.jpg" , "" )
    ]
]
^D
hi |https://pandoc.org/diagram.jpg|

.. |https://pandoc.org/diagram.jpg| image:: https://pandoc.org/diagram.jpg

But we can use top, middle, or bottom alignment:

% pandoc -f native -t rst
[ Para
    [ Str "hi "
    , Image
        ( "" , [ "align-top" ] , [] )
        [ Str "https://pandoc.org/diagram.jpg" ]
        ( "https://pandoc.org/diagram.jpg" , "" )
    ]
]
^D
hi |https://pandoc.org/diagram.jpg|

.. |https://pandoc.org/diagram.jpg| image:: https://pandoc.org/diagram.jpg
   :align: top