marker_anchor options are ignored

Just noticed this today working with RichMarker, the CoffeeScript syntax actually works, but  the first option doesn't return the correct value:

For example if `args.marker_anchor` is `[1, true]`

```coffeescript
if args.marker_anchor? ? args.marker_anchor[1] else false
#=> undefined
```

vs what we really wanted which is:

```coffeescript
if args.marker_anchor? then args.marker_anchor[1] else false
#=> true
```