IMO, if we're going to support disabling the operators (which is great, BTW!), we should make this config option an attribute rather than a bang method:

``` ruby
RSpec.configure do |config|
  config.expect_with :rspec do |expectations|
    expectations.enable_matcher_boolean_operators = true
    # or
    expectations.enable_matcher_boolean_operators = false
  end
end
```

The attribute interface is simpler and more standard, so I use that when it makes sense. I usually only use the bang method form for configs that don't support being disabled, since using an attribute interface suggests that it supports that.