Please review a mostly-trivial rename of HtmlTag to TagName, as
discussed after the recent review for updating HtmlTree.
The rename was a single automated IDE operation.
In addition, some minor functionality on HtmlTag is moved to HtmlTree,
which is the only place where it is used, while writing out the tree.
And, I have added additional links to pages on html.spec.whatwg.org and
www.w3.org/TR/html51 to some classes in formats.html.markup. There are
no manual changes to the classes in formats.html package.
One test was affected, that used the internal HtmlTag/TagName class.
Apart from that, no tests were affected.
-- Jon
JBS: https://bugs.openjdk.java.net/browse/JDK-8241030
Webrev: http://cr.openjdk.java.net/~jjg/8241030/webrev.00/index.html
