Change what is said about SNEWS coincidences

assigned to @brandon.piotrzkowski

added to epic &8

changed milestone to %ER15 Release

This issue is pretty vague, but it may be worth adding a SNEWS coincidence example in the various test outputs to ensure this works.

I don't see any major issues with what is said about SNEWS coincidences (maybe say more, but we don't have that much info available early on). Therefore I think we can close this after adding an example.

mentioned in merge request !119 (merged)

closed with merge request !119 (merged)

closed with commit eea8d552