The same five sources compiled with Curry front end 2.0.0 (FlatCurry 3)
and 3.1.0 (FlatCurry 5), respectively. The survey's paired probes supplied
the files: --flat --extended, with each front end's own Prelude. These
small text fixtures are independent of the configured compiler; they are
not runtime products or replacements for the pinned ICurry oracle.

Classes: a class and an instance; Locals: Free and Let; Incomplete: an
incomplete Boolean case; Funpat: a functional pattern; Records: a record,
derived instances and a newtype. Sources are in sources/. The writer must
round-trip each file byte for byte, including the absence of a final newline.
