'
+test_expect_success 'git clean with skip-worktree .gitignore' '
+ git update-index --skip-worktree .gitignore &&
+ rm .gitignore &&
+ mkdir -p build docs &&
+ touch a.out src/part3.c docs/manual.txt obj.o build/lib.so &&
+ git clean &&
+ test -f Makefile &&
+ test -f README &&
+ test -f src/part1.c &&
+ test -f src/part2.c &&
+ test ! -f a.out &&
+ test ! -f src/part3.c &&
+ test -f docs/manual.txt &&
+ test -f obj.o &&
+ test -f build/lib.so &&
+ git update-index --no-skip-worktree .gitignore &&
+ git checkout .gitignore
+'
+
test_expect_success 'git clean' '
mkdir -p build docs &&