* Fix some regressions' expected outputs.

* Fix some regressions' expected outputs.

* Ensure Rewriter::init() is called before ::rewrite().
  The array type enumerator recently gave us an end-run around
  ::init().  TheoryEngine no longer calls these, they're done
  via static initialization.

* Respect scope for declare-sort/declare-fun/define-sort/define-fun... (resolves bug 412).

(this commit was certified error- and warning-free by the test-and-commit script.)