The current code will check if `/project/path/file/path.extension` is included on an array of paths in this form: `file/path.extension`. That'll always return false, so the files will never be excluded.
In my case, I have a project in `/Users/ale/Code/Website-frontend`, and in my `_config.yml` I have a `files_to_exclude: [_pages/**/*]` setting.
If I run `jekyll algolia` without this fix, one of my files is checked against the excluded files array using its full path (`/Users/ale/Code/Website-frontend/_pages/community/organizer-guide.md`), while the array contains its relative path (`_pages/community/organizer-guide.md`) so it doesn't match and it's included on the index.
I haven't had time to update the spec for this change, but since the tests still pass I assume there's something wrong with the existing tests.
