madrobby/zepto — pull request #620 by vikstrous (2012-10-20 20:17:30+00:00)
Title: improve the way undefined is used in a few places 

These changes should have no effect on the logic and make the code slightly smaller and simpler. I couldn't run the tests locally. Please test.

Also, any idea why I can't run the tests?

```
$ rake test
script/test
Can't open 'test/runner.coffee'
rake aborted!
Command failed with status (255): [script/test...]

Tasks: TOP => test
(See full trace by running task with --trace)
$ ls test/runner.coffee
test/runner.coffee
```