Add note about nested tagged templates and arrays.

[gnarf]

Just a note...

Also, what escaping does the tagged template helper use for attributes / innerText/HTML? I'd like to add that to the docs as well.

[tbranyen]

Awesome thanks! diffHTML doesn't do any escaping, but does do HTML entity decoding to support Unicode/HTML5 entities in text nodes. In the transform branch it will only decode HTML entities if there is an ampersand present in the string (for perf reasons).

Another thing we should note is that in the case of things like srcdoc diffHTML currently doesn't support parsing unescaped markup from attributes. So this will not work:

<iframe srcdoc="<center>of attention</center>"></iframe>

But this will:

<iframe srcdoc="&#x3C;center&#x3E;of attention&#x3C;/center&#x3E;"></iframe>