I don't know why this was a link to tosdr rather than Tumblr's own diffs. I am not even certain whether to trust it as the content doesn't seem to be the same as Tumblr's. (That, or maybe I am myself simply confused.) Regardless, here was a "shocking change".

https://github.com/tumblr/policy/compare/2cfe3c8668...adfff3...

Upvoted, not be cause of the tl;dr request, but for the "shocking changes we should all be complaining about". It made me laugh and then think about the peculiar nature of this community.