```
[2] pry(main)> def hello_world
[2] pry(main)*   <<-STR.strip_heredoc
[2] pry(main)*     win
[2] pry(main)*   STR
[2] pry(main)* end  
=> nil
[3] pry(main)> hello_world
=> "win\n"
```

@steveklabnik