Do not align hash values

It seems that some people have started to align has values. Our code base doesn't do this currently so for consistency I would vote to not start now.

```ruby
# bad
def send_mail(source)
  Mailer.deliver(
    to:      "bob@example.com",
    from:    "us@example.com",
    subject: "Important message",
    body:    source.text
  )
end

# good
def send_mail(source)
  Mailer.deliver(
    to: "bob@example.com",
    from: "us@example.com",
    subject: "Important message",
    body: source.text
  )
end
```