439 PR title is empty

I hope you don't mind me jumping in to get a pull request for this issue. Seems like a simple fix. :smile:

The logic I was thinking of was:

``` ruby
if line =~ /\S/ and title.empty?
  title << line
elsif !title.empty?
  body << line
end
```
But the `strip!` call allows for a even simpler change. 

Fixes #439