git diff vs github pr diff

git-diff-github.md

Git diff: double dots vs tripple dots

• double dots: simple diff
• tripple dots: common ancestor diff

Examples

Use double dots (..) to show changes in the feature branch that are not in the parent.

git diff feature..main

Use triple dots (...) to show all the changes beginning at the common ancestor of the feature branch and the parent. Pull requests on GitHub show a three-dot diff.

git diff feature...main