Error on saving obfuscated pdf

```
What steps will reproduce the problem?
1.run bug.rb (see attachment - it's modified
"samples\actions\launch\winparams.rb")

What is the expected output? What do you see instead?
Origami can't save obfuscated PDF:

/origami/obfuscation.rb:192:in `to_s': wrong number of arguments(1 for 0)
(ArgumentError)
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/obfuscation.rb:192:in `block in to_obfuscated_str'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/obfuscation.rb:190:in `gsub!'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/obfuscation.rb:190:in `to_obfuscated_str'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/obfuscation.rb:121:in `block in to_obfuscated_str'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/obfuscation.rb:119:in `each_pair'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/obfuscation.rb:119:in `to_obfuscated_str'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/obfuscation.rb:223:in `to_obfuscated_str'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/pdf.rb:1020:in `block in output'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/pdf.rb:892:in `each'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/pdf.rb:892:in `output'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/lib/origami/pdf.rb:299:in `save'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/origami-1.2.3/samples/actions/launch/test.rb:22:in `'

What version of the product are you using? On what operating system?
- Origami gem v.1.2.3
- Ruby 1.9.3 on Windows XP

Please provide any additional information below.

```

Original issue reported on code.google.com by `reapedbr...@bk.ru` on 21 Feb 2012 at 11:53

Attachments:
- [bug.rb](https://storage.googleapis.com/google-code-attachments/origami-pdf/issue-12/comment-0/bug.rb)