rules fixtures: append comment indicating fixture origin

src/ifcopenshell-python/test/fixtures/rules/generate_14.py

@@ -1,5 +1,5 @@
 import ifcopenshell
-from generate import normalize_header
+from generate import normalize_header, pass_if, write_fixture
 
 dims = [
     (1, 0, 0, 0, 0, 0, 0),
@@ -18,4 +18,4 @@ for i, d in enumerate(dims):
         f.createIfcMeasureWithUnit(f.createIfcLengthMeasure(5.0), f.createIfcSIUnit(Prefix="NANO", Name="METRE")),
     )
     normalize_header(f)
-    f.write(f"{'pass' if i == 0 else 'fail'}-conv-unit-{i}-ifc2x3.ifc")
+    write_fixture(f, __file__, pass_if(i == 0), f"conv-unit-{i}-ifc2x3")