account_with_tooltip 과 copyright_with_tooltip 헬퍼 메소드를 추가하고 반영하였음.

```ruby
def account_with_tooltip(email)
  content_tag :span, title: email, data:{toggle:'tooltip'} do
    content_tag(:i, content_tag(:strong, email.split('@').first.capitalize)).html_safe
  end
end

def copyright_with_tooltip(resource, email)
  icon_label('user', t('authored_html', who: account_with_tooltip(email), ago: time_ago_in_words(resource.created_at)))
end
```