return environment_info unless environment_name

return environment_info if configuration.environment_name dose not exists. (plain ruby script)

```
def foo
  info = 'first'
  info << ' second' if false
end

foo
=> nil

def foo
  info = 'first'
  info << ' second' if false
  info
end

foo
=> 'first'
```
Merge pull request #217 from ZubKonst/patch-1

return environment_info unless environment_name