Rob Poulter

Inconsistent behaviour between bang and no-bang method

7

```ruby hash1 = { a: 1, b: 2 } => {:a=>1, :b=>2} hash2 = { a: 3, c: 4 } => {:a=>3, :c=>4} hash1.deep_merge(hash2) => {:a=>1, :b=>2, :c=>4} hash1.deep_merge!(hash2) =>...