[zendframework/zendframework#4822] CS

- If we're going to make readability changes, let's make them consistent
  with the rest of the framework:
  - array arguments should all have commas following each entry
  - array arguments as sole argument of a method can open on same line
    as call; indentation then adjusts one level less
- Use `assertInstanceOf` throughout, instead of `assertTrue($a instanceof $b)`
- While the `setExpectedException()` lines get a little long, they're
  not unreadable; breaking them into multiple lines makes intent less
  clear.