Citação:
If you tap on the gym it shows a fighting animation. This happens only when the gym is being fought by a rival team. If the gym is being trained only the normal map animation will be present. This way you can know if the gym is being fought or trained!There's several other changes not in the changelog.
Update to Pokémon info screen look
Swiping away the info screen now takes you back to the list
Those are all I've found so far
Edit:
Pink circle around the Pokémon you select to catch on the map
Overall a nice little update. I hope we get something bigger after the Halloween event
https://www.reddit.com/r/pokemongo/comments/5945lz/update_adds_a_new_gym_animation/