Fixes #5929: fix nbsp test

I'm not happy with this - we are including an explicit list, which means that one day we'll add something, and the tests won't cover it. Can we please exclude what we don't want to check instead?

This should do it:

```
find ${NCF_TREE}/.. -not -wholename "*/.git/*" -not -wholename "${NCF_TREE}/../api/flask*"
```