Fixed indexing of {datadesc} environments.

Fixed indexing of {datadesc} environments.

Removed " (byte code instruction)" from the output of the {opcodedesc}
environment; this should only appear in the index (which it now does).

Removed some really old cruft related to otherwise removed debugging code.
(I *think* assignments to $* set & clear auto-flush of <STDOUT>, but don't
really remember.  Removing them seems to not change anything!)