Fix markup bug in PEP 544

pep-0544.txt

@@ -752,7 +752,7 @@ However, it should be possible for protocol types to implement custom
 instance and class checks when this makes sense, similar to how ``Iterable``
 and other ABCs in ``collections.abc`` and ``typing`` already do it,
 but this is limited to non-generic and unsubscripted generic protocols
-(``Iterable`` is statically equivalent to ``Iterable[Any]`).
+(``Iterable`` is statically equivalent to ``Iterable[Any]``).
 The ``typing`` module will define a special ``@runtime`` class decorator
 that provides the same semantics for class and instance checks as for
 ``collections.abc`` classes, essentially making them "runtime protocols"::