RSpec 3 provids the [all matcher](https://www.relishapp.com/rspec/rspec-expectations/v/3-3/docs/built-in-matchers/all-matcher). For example,

```
expect(['Tom', 'Tony', 'Rosa']).to all( include("o") )

```

You can also have

```
expect(['Tom', 'Tony', 'Rosa']).to_not all( include("o") )

```

But how do you express "to all not"?