The diff feature is now live. Click the "diff" button above an item to use it. You can choose any item from your history to diff it against. Example: https://dpaste.com/8WPCDRFHL/diff/ABCD23456
Example use case: You're in your team Slack or an IRC channel helping somebody fix a bug. They post a dpaste item with the problem code. You view the item, duplicate it and make the changes it needs, then post the diff link.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.