Might need to update this test to satisfy [`keys_file.rb#L60`](https://github.com/alindeman/github-auth/blob/d07c8e2388c2e4a902caf95ac336a3404eaa1508/lib/github/auth/keys_file.rb#L60)

```ruby
content = keys_file.read
expect(content).to end_with("\n") unless content.empty?
```