gh-130425: Add "Did you mean" suggestion for del obj.attr

Author: sobolevn

Misc/NEWS.d/next/Core_and_Builtins/2025-02-22-01-23-23.gh-issue-130425.x5SNQ8.rst

@@ -0,0 +1,2 @@
+Add ``"Did you mean"`` suggestion when using ``del obj.attr`` if ``attr``
+does not exist.

Objects/dictobject.c

@@ -6898,6 +6898,7 @@ store_instance_attr_lock_held(PyObject *obj, PyDictValues *values,
         PyErr_Format(PyExc_AttributeError,
                         "'%.100s' object has no attribute '%U'",
                         Py_TYPE(obj)->tp_name, name);
+        _PyObject_SetAttributeErrorContext(obj, name);
         return -1;
     }