Updating ddoc to support modern HTML tags

[Jakob Ovrum via Digitalmars-d]

On Tuesday, 21 April 2015 at 23:48:04 UTC, Walter Bright wrote:
> 1. none of these are problems with Ddoc

No, but there's still a problem with dlang.org, the biggest user 
of DDoc.

> 2. they just look like a few typos to me

No, the main issue is nesting lists in paragraphs and other 
illegal nestings.

> 3. the PR is already merged

The PR only fixed the bare minimum to make it past kindlegen.