Redundant/confusing info in README

Hi,
maybe I'm understanding something wrong, but aren't these snippets functionally equal (except for the `format` being excluded and string vs. symbol key):

```ruby
config.lograge.custom_options = lambda do |event|
  {params: event.payload[:params].except('controller', 'action', 'format')} #exclude redundant params
end
```

and 

```ruby
config.lograge.custom_options = lambda do |event|
  params = event.payload[:params].reject do |k|
    ['controller', 'action'].include? k
  end

  { "params" => params }
end
```

They are both listed in the 'What is doesn't do'-section directly after one another - if they indeed do both the same thing, then removing the second example (as it seems a bit convoluted) would reduce confusion.

All the best,
Fabian