Install keyring:
curl -fsSL https://jereok91.github.io/rustdiff/KEY.gpg | sudo tee /usr/share/keyrings/rustdiff-archive-keyring.gpg >/dev/null
Add repository:
echo "deb [arch=amd64,arm64 signed-by=/usr/share/keyrings/rustdiff-archive-keyring.gpg] https://jereok91.github.io/rustdiff stable main" | sudo tee /etc/apt/sources.list.d/rustdiff.list >/dev/null
Install package:
sudo apt update && sudo apt install rustdiff