@codestart and @codeend is failing to generate code examples

```
@function can.Object.subset
@parent can.util
@description Returns true if an Object is a subset of another Object
@codestart
can.Object.subset({}, {foo: "bar"} ) //-> true
@codeend
@signature `can.Object.subset(subset, set, compares)`
@param {Object} subset
@param {Object} set
@param {Object} compares
@returns {Boolean} Whether or not subset is a subset of set
```

In the above example, the code within @codestart/@codeend should render as a child of the description. The code DOES NOT render at all.

Reproduce the documented example containing @codestart and @codeend, then trace the entry point that parses or renders those tags. Confirm that the code example appears as a child of the description and add or update coverage for this case.

Written by the indexing model from the issue text.