Apply ruff/pyupgrade rule UP028

UP028 Replace `yield` over `for` loop with `yield from`

Author: DimitriPapadopoulos

src/cffi/model.py

@@ -371,8 +371,7 @@ def enumfields(self, expand_anonymous_struct_union=True):
             if (name == '' and isinstance(type, StructOrUnion)
                     and expand_anonymous_struct_union):
                 # nested anonymous struct/union
-                for result in type.enumfields():
-                    yield result
+                yield from type.enumfields()
             else:
                 yield (name, type, bitsize, quals)
 

testing/cffi1/test_recompiler.py

@@ -1242,8 +1242,7 @@ def test_macro_var_callback():
     #
     values = ffi.new("int[50]")
     def it():
-        for i in range(50):
-            yield i
+        yield from range(50)
     it = it()
     #
     @ffi.callback("int *(*)(void)")