Updated example to work with newer sample data.

[pelson]

This change depends on SciTools/iris-sample-data#2 being accepted.

[bblay]

The graphic has changed; there are about 30 times as many x ticks and all the x labels overlap.
The rest of the graph is exactly the same though.

[bblay]

The extests also fail as a result of the changed graphic.

[pelson]

The extests also fail

They passed for me... strange. Wont be able to test this now for a couple of weeks. Can you double check that it has broken it with the new data?

[bblay]

Can you double check

Apologies, that built fine. Not sure what I did wrong there.

I'm now getting 3 doctest failures though, related to an extra forecast_reference_time coord.
Can you confirm or did I do that wrong too? 😀

[pelson]

Can you confirm or did I do that wrong too?

Ah no. I probably didn't run those. Are you able to help me out by providing fixes? If not, I'll do it when I get back.

Thanks,

[bblay]

Aye, pelson#15