GeoJSON output incorrectly has two representations

[markmiro]

Create a code cell with this to reproduce:

from IPython.display import GeoJSON
GeoJSON({})

This results in two outputs with mimeTypes:

• application/geo+json
• application/json

The application/json is also always empty, even if GeoJSON() is given content:

from IPython.display import GeoJSON
GeoJSON({
  "type": "Point",
  "coordinates": [-118.4563712, 34.0163116]
})

Wrapping in display() fixes the issue.

Related:
runtimed/intheloop#543