test_expect_success 'use index-filter to move into a subdirectory' '
git branch directorymoved &&
git filter-branch -f --index-filter \
- "git ls-files -s | sed \"s-\\t-&newsubdir/-\" |
+ "git ls-files -s | sed \"s- -&newsubdir/-\" |
GIT_INDEX_FILE=\$GIT_INDEX_FILE.new \
git update-index --index-info &&
mv \"\$GIT_INDEX_FILE.new\" \"\$GIT_INDEX_FILE\"" directorymoved &&