Tests that console logging uses proper message formatting.
console-message-format.js:13 Message format number 1, 2 and 3.5
console-message-format.js:14 Message format for string
console-message-format.js:15 Object {foo: 'bar'}
console-message-format.js:16 Array (2) ['foo', 'bar']
console-message-format.js:17 Object as object: Object
console-message-format.js:18 Array as object: Array(2)
console-message-format.js:19 Floating as integers: 42 42
console-message-format.js:20 Floating as is: 42.5
console-message-format.js:21 Non-numbers as numbers: NaN NaN NaN
console-message-format.js:22 String as is: string
console-message-format.js:23 Object as string: [object HTMLDocument]