nit

Author: corona10

Objects/dictobject.c

@@ -8378,11 +8378,9 @@ frozendict_hash(PyObject *op)
 }
 
 
-/* Allocate an empty, GC-untracked frozendict.  Construction is kept untracked
-   so that, while user code (keys()/__getitem__) runs and the object is still
-   half-built, another thread cannot reach it via gc.get_objects() and observe
-   its length and contents changing.  Callers must GC-track it once it is fully
-   built. */
+/* Allocate an empty, GC-untracked frozendict.  Staying untracked while it is
+   filled keeps a half-built frozendict out of gc.get_objects(), so another
+   thread can't observe it changing.  Callers must GC-track it once fully built. */
 static PyObject *
 frozendict_new_untracked(PyTypeObject *type)
 {