delete mode 100644 lib/std/compress/xz/check.zig
 delete mode 100644 lib/std/compress/xz/multibyte.zig
 delete mode 100644 lib/std/compress/xz/stream.zig
 delete mode 100644 lib/std/compress/xz/stream_test.zig
 create mode 100644 lib/std/compress/xz/test.zig