| Tests that command line api works. | |
| $0.toString() = "[object HTMLParagraphElement]" | |
| $3 = undefined | |
| keys([3,4]).toString() = "0,1" | |
| values([3,4]).toString() = "3,4" | |
| $('foo').toString() = "[object HTMLParagraphElement]" | |
| $$('p#foo').toString() = "[object NodeList]" | |