[PR] [DOCS] Specify new behavior on {} starting in Flow 0.89
[PR] [DOCS] Specify new behavior on {} starting in Flow 0.89

Summary:
This behavior surprised our team and we're not the only ones (see https://github.com/facebook/flow/issues/7491 #7456 https://github.com/facebook/flow/issues/7463)

This change in behavior should be mentioned in the changelog at the least.
Pull Request resolved: https://github.com/facebook/flow/pull/7839

Reviewed By: jbrown215

Differential Revision: D16062687

Pulled By: gkz

fbshipit-source-id: 7e8566626c44ffffd35d216f7c91a1081009acc5

facebook/flow,samwgoldman/flow,mroch/flow,samwgoldman/flow,samwgoldman/flow,samwgoldman/flow,mroch/flow,facebook/flow,gabelevi/flow,samwgoldman/flow,facebook/flow,samwgoldman/flow,mroch/flow,mroch/flow,samwgoldman/flow,mroch/flow,mroch/flow,mroch/flow,gabelevi/flow,facebook/flow,facebook/flow,gabelevi/flow,facebook/flow,gabelevi/flow,gabelevi/flow,facebook/flow,gabelevi/flow,gabelevi/flow