Setup file to test `git diff --ignore-whitespace -p`

test.sh

#!/bin/bash

if ! test -d /tmp/tmp
then
	mkdir -p /tmp/tmp
else
	rm -rf /tmp/tmp
	mkdir /tmp/tmp
fi

pushd /tmp/tmp

git init
echo "first commit" >first_commit
git add first_commit
git commit -m "initial commit"

echo "file with trailing spaces    " >file_with_trailing_spaces
git add file_with_trailing_spaces
git commit -m "c1"

echo "file with trailing tab	" >file_with_trailing_tab
git add file_with_trailing_tab
git commit -m "c2"

cat << EOF >code_with_whitespaces

for i in range(10):    
	f(x) != F(x)	
	do while not exhausted	    
		
done			
bye!    		

EOF

git add code_with_whitespaces
git commit -m "c3"

popd