Spec for execute_result doesn't mention transient field

[takluyver]

The spec for execute_result messages says:

These are identical to display_data messages, with the addition of an execution_count key.

However, display_data has an optional transient field, which is not mentioned in the description of execute_result. Is it allowed there? Or is that field only for display_data and update_display_data?

[rgbkrk]

execute_result should be able to have the transient field, though I don’t know of a direct way to use it in ipython (especially for setting a display id)

[minrk]

yeah, the "identical to display_data" statement should take precedence, since it is the definition as opposed to the description. I just didn't copy the transient part when updating everything else.

[takluyver]

Thanks. I'm just updating jupyter_kernel_test to validate messages more strictly.