Nb72 bugfix #211792 (web.html)

• Description of the bug (including IZ #)

http://netbeans.org/bugzilla/show_bug.cgi?id=211792

Bug 211792 - [attribute name len > 32k !?!] StringIndexOutOfBoundsException: String index out of range: 933

• Impact assessment i.e. why it is a show stopper?

The exception is thrown quite often when one types a new attribute into and unclosed open html element. 

• Risk assessment i.e. why is it safe?

Just some simple tests for element's attribute validity have been added

• Confirmation of peer code review and QE verification of fix

Tested and confirmed by [email protected]

• Changeset info (for reviewing diffs)

fix: http://hg.netbeans.org/web-main/rev/2d7e7f5f528e

Marek