string in a safe way.

Yeah...Zope is now a regex|ts_regex|regsub zone. Replaced and removed all old regex stuff. No one survived.

changes for CancelAction with the test->tests checkin.  Undo this.

(I also screwed up my attempt to undo this silently in the RCS file --
I accidentally deleted revision 1.19 from the RCS file.
Fortunately, the log message for that revision said "Add 'nothing' to
the initial dictionary (its value is None)." and it changed only one
line, so that's no big deal.)

changes for CancelAction with the test->tests checkin.  Undo this.

(Also in DummyEngine.py, but there I screwed up the undo, so it will
take a little longer.)