Reword again

Author: neonene

Modules/_datetimemodule.c

@@ -51,7 +51,7 @@ typedef struct {
     PyObject *epoch;
 
     /* Extra reference to the interpreter's dict that will be decref'ed last
-     * at shutdown. Use the dict to reserve the current module. */
+     * at shutdown. Keep the current module in the dict. */
     PyObject *interp_dict;
 } datetime_state;