[aria-testsuite] markup errors in ARIA testsuite

While running the documents in the ARIA testsuite through the W3C validator
to test the HTML+ARIA support in the validator, I found some documents with
markup errors, and made some fixes to correct the errors. See the attached
diff or the changesets here:

  https://bitbucket.org/sideshowbarker/pfwg-fork/compare/A..default#diff

The errors are all basically markup well-formedness errors -- missing
left-angle brackets in tags, start tags that should be end tags, duplicate
start tags, duplicate attributes, etc. -- things that the HTML parser is
error-correcting for or ignoring. So none of the fixes should change the
results of any of the tests.

  --Mike

-- 
Michael[tm] Smith http://people.w3.org/mike