PEP 509

* point to PEP 510 for static optimizers
* remove link to issue 19332, dict.__version__ doesn't help

pep-0509.txt

@@ -42,6 +42,11 @@ constant.  This optimization requires a guard on the global variable to
 check if it was modified. If the variable is modified, the variable must
 be loaded at runtime, instead of using the constant.
 
+See the `PEP 510 -- Specialized functions with guards
+<https://www.python.org/dev/peps/pep-0510/>`_ for the concrete usage of
+guards to specialize functions and for the rationale on Python static
+optimizers.
+
 
 Guard example
 =============
@@ -164,18 +169,6 @@ compared to the slow down of using a more complex type.
 Usage of dict.__version__
 =========================
 
-Detect dictionary mutation during iteration
--------------------------------------------
-
-Currently, iterating on a dictionary only detects when the dictionary
-size changes, but not when keys or values are modified. Using the
-dictionary version, it would be possible to detect when keys and values
-are modified.
-
-See the `issue #19332: Guard against changing dict during iteration
-<https://bugs.python.org/issue19332>`_.
-
-
 astoptimizer of FAT Python
 --------------------------