Document edge cases for type inference with published properties

[tjsavage]

e.g. troublesome cases:

<x-foo bar="">
<x-foo bar="true">
<x-foo bar="false">
<x-foo bar="0">
...

[arthurevans]

I'm not sure I understand what we're looking for here? Is this something other than the type hinting we talk about here: https://www.polymer-project.org/docs/polymer/polymer.html#configuring-an-element-via-attributes

[arthurevans]

Sorry, finally grokked that there was more detail in the linked bugs, Polymer/polymer#93 and Polymer/polymer/#77

[arthurevans]

This is an old 0.5 bug; stuff works a bit differently in 1.0 (no type hinting involved), and we have some coverage on the peculiarities of boolean properties & attributes:

https://www.polymer-project.org/1.0/docs/devguide/properties.html#configuring-boolean-properties

So closing this one out.