This change fixes a few issues that SonarQube surfaced:

- In a couple places, we were iterating over object fields without testing
  `hasOwnProperty`.
- The calls to `testCloseDescription` were passing too many arguments.
- We were testing whether `indexOf` returned a value greater than zero, but
  zero is a valid return value.

Reviewed at https://reviews.reviewboard.org/r/8733/

ok