pDocumentTemplate compatibility is not vital, this solution
works well enough.

change is intended to solve it once and for all: there's now a "safe_callable"
function, implemented both in cDocumentTemplate and pDocumentTemplate, that
can more reliably check for callability.

A surprising side effect is that DTML is about 15% faster with this change
(according to a rudimentary test).

slower than the old code.  With this change, we're using simple function
calls again to perform security checks.  But the calling sequence is
intended to be easier to comprehend than the old code.  Now instead of
DT_String.String subclasses having a validate() method attached to them, they
subclass AccessControl.DTML.RestrictedDTML, which provides a guarded_getattr()
method and a guarded_getitem() method.

Note that the functionality of guarded_getattr() used to be implemented
both in C and Python (in cDocumentTemplate and DT_Util), but now it's in
one place, ZopeGuards.py.  Thus it's not only reusable but easy to
optimize.

I ran all the tests and ran the new code through the profiler again.  The
change sped up restricted code a little more than expected, which is
definitely a good thing, but that may indicate that nested scopes
have a hidden speed penalty.

Also, RestrictedPython is now restrictive about printing to targets and
two forms of augmented assignment had to be forbidden.

the cloned object was reattached to the object tree, which caused reindexing
of copied objects to fail.

  This is much faster (according to profiler results) than letting
  validate() check for simple types.

- Corrected handling of slice objects passed to guarded_getitem().

- Used guarded_getitem() instead of a read guard in guarded_map().

DT_String.String that adds Zope security.

instead of any other error that may be raised.

to my private branch

The doc_header method makes a copy of the paragraph it's working on and returns it in the case that what follows it is an example.  When doing so, the attributes attached to the paragraph were lost.  Changes made to the doc_header method copy the attributes assigned to the paragraph as well as the body, making the copy carry along paragraph attributes.

The indention function returned a bogus number of spaces in front of the string it was passed, causing subparagraphs of a paragraph that were indented by less than two spaces to appear at the same indent level as their parent paragraph.  This is now fixed, and paragraphs may be indented by a single space, just as they are in StructuredTextClassic.

Now, when products are installed, they are installed in alphabetical order by product name, regardless of which Products directory (e.g. INSTANCE_HOME or SOFTWARE_HOME) that they're in EXCEPT FOR PluginIndexes, which are always first, due to the requirement that they register interfaces with the product context machinery before ZCatalog is initialized.

ConflictResolvingTransUndoStorage to ensure that the Full storage
passes the application level conflict resolution tests.  It does!

ConflictResolution helper module.  Specifically,

class Full: add ConflictResolvingStorage to the base classes, so we
magically grow self.tryToResolveConflict().

store(): Keep a flag indicating whether we calculated the object's
pickle data via conflict resolution.  If so, we return the special
marker ResolvedSerial instead of the next available serial number.

Also, in the serial <> oserial clause, try to resolve the conflict
using ConflictResolvingStorage.tryToResolveConflict() and raise a
ConflictError only if that fails (i.e. returns a false value).
Otherwise, the resolution succeeded providing us with the data pickle
to use as the stored object's state.

transactionalUndo(): We need to keep an additional list of actions to
perform on a successful undo.  The first list keeps track of existing
revisions to point the new transaction at, but conflict resolution
provides us with a brand new pickle (or at least, a pickle for which
we've no idea what the lrevid pointer should be).  For those
situations we need to do a CommitLog.write_object() instead of a
CommitLog.write_object_undo() so as to get the new pickle into the
commit log.  Thus, newstates is a list keeping track of conflict
resolved object states, while (the existing) newrevs keeps track of
undo records where we already have the pickle in the database.

Also, in the clause where we raise an UndoError, first
tryToResolveConflict() and only if that fails do we raise the
UndoError.  Should it succeed, we append the record to newstates for
later.

Finally, in the clause were we're replaying the changes into the
commit log (because we now know that all undos will succeed), we first
replay the newrevs entries, then we replay the newstates entries,
making sure we return all the affected oids.

Note: these changes impose no regressions and pass all tests in
ConflictResolvingStorage and ConflictResolvingTransUndoStorage.

This is a module used for backwards-compatibility aliasing.  It potentially makes PythonMethods work with the current trunk, as well as solving some community issues with the import of the Eval class.

define "test" name, used by external code for import.  This potentially makes existing revisions of PythonMethods work ok with the current trunk.

Import the html_quote function from the html_quote module so that modules that depend on the html_quote function being importable from this one don't fail.

New module that has an html_quote function that is imported into both DT_Var and DT_Utils to support older code that depends on the function to be in either place.