It's all the tooling: phabricator has diffs, perforce has changelists and git has both "merge" and "pull". Tools don't agree on what to call stuff, and everyon

It's all the tooling: phabricator has diffs, perforce has changelists and git has both "merge" and "pull". Tools don't agree on what to call stuff, and everyone uses different tools (and a lot of these tools are pretty old). Perforce is from '95, phabricator is from '07. Both of those predate widespread usage of git (released '05), so it's pretty reasonable that everything is different.