[Bug #921657] Allow '@' in unquoted HTML attributes.  Not strictly legal according to the HTML REC, but HTMLParser is already a pretty loose parser.  Reported by Bernd Zimmermann.

instructions.

This closes SF patch #669683.

imports e.g. test_support must do so using an absolute package name
such as "import test.test_support" or "from test import test_support".

This also updates the README in Lib/test, and gets rid of the
duplicate data dirctory in Lib/test/data (replaced by
Lib/email/test/data).

Now Tim and Jack can have at it. :)

change their basic behavior:  When parsing something that cannot possibly
be valid in either HTML or XHTML, raise an exception.

broken declaration-like things.

module has to deal with "class" HTML-as-deployed as well as XHTML, so we
cannot be as strict as XHTML allows.

This closes SF bug #453059, but uses a different fix than suggested in
the bug comments.

names of the test methods were not changed from the Zope-standard "check"
names to the Python-standard "test_" names, so the tests were not actually
being run.

Added test of hexadecimal character references as a regression check for
SF bug #445196.

TAL/PageTemplate package for Zope.  This only needed a little boilerplate
change; the tests themselves are unchanged.