iter ct.4.3: prose qualifier-trim-on-print + ordering_match snapshot

examples/ordering_match.prose.txt

@@ -0,0 +1,11 @@
+// module ordering_match
+
+/// Iter 23.1 fixture: pattern-match on prelude Ordering ctor without explicit
+/// prelude import.
+fn main() -> Unit with IO {
+  do io/print_int(match LT {
+    LT => 1,
+    EQ => 2,
+    GT => 3
+  })
+}