set +xv
. /t/prompt/prompt 
test -d demo && rm -rf demo/
test -d ../demo && cd .. && rm -rf demo/ 
clear
mkdir demo
cd demo
git init
echo "1st line" > FOO
git add FOO
touch  untracked.o
rm     untracked.o
git commit -q -m "FOO's 1st line" 
git checkout -b test
echo "added 2nd line in test" >> FOO 
git add FOO 
echo "1st BAR" > BAR
git add BAR
echo "added 3nd line" >> FOO 
git add FOO
git commit -q -m "FOO moded, BAR added"
git checkout master
cat FOO 
echo "now added 2nd line in master" >> FOO 
git add FOO
git commit -q -m "2nd line"
git merge test
git-cat-file -p test:FOO > FOO
git add FOO 
git commit -q -m "merged"
cat FOO
git checkout HEAD^
cat FOO
git checkout master