#!/bin/bash


repo=$(mktemp -d)
cd $repo

git init
git commit --allow-empty -m "Initial commit"

cat > file <<EOF
aaaa a aaa
bbbb b bbb
cccc c ccc
EOF

git add file
git commit -m "Base commit"

cat > file <<EOF
bbbb ! bbb
dddd d ddd
cccc ! ccc
EOF

git add file
git commit -m "Changes"

git log --patch