/** Single-line jsdocs not supported */

If I use the concise jsdoc syntax (all on one line):

``` js
/** description of prop */
foo: React.PropTypes.any
```

I end up with `"description":""` in my output.

Changing it to 

``` js
/** 
 * description of prop 
 */
```

or even

``` js
/** 
 * description of prop */
```

works correctly (`"description":"description of prop"`).
