- Create fewer Issue objects; 2 is as good as 5 for these cases. This
gives us a nice little speed improvement.
- Don't `describe` Symbols.
- Simplify object creation.
- Lessen "mystery guest" antipattern
1. Don't use instance variables, use `let` instead.
2. Add descriptions for all specs.
3. Share variables where possible.
4. Give labels more vivid names than 1, 2, and 3.
5. Remove deprecation warnings by passing issue IDs as '1,2,3' instead
of an array, as that's how they're passed by the front-end. (The
deprecation warning is for passing a nested array, which is what
happens if an actual array is passed, as:
`[1, 2, 3].split(',') == [[1, 2, 3]]`
