Fixed internal links.

Author: facundobatista

peps/pep-0769.rst

@@ -42,7 +42,7 @@ individual default values to multiple attributes or items. While some
 discussions considered allowing multiple defaults, the increased
 complexity and potential for confusion led to favoring a single default
 value for all cases (more about this below in `Rejected Ideas
-<PEP 769 Rejected Ideas>`__).
+<PEP 769 Rejected Ideas_>`__).
 
 
 Specification
@@ -186,7 +186,7 @@ more complex alternative would be::
             value = XYZ
 
 Better performance, more complicated to implement and explain. This is
-the first case in the `Open Issues <PEP 769 Open Issues>`__ section later.
+the first case in the `Open Issues <PEP 769 Open Issues_>`__ section later.
 
 
 Corner Cases
@@ -293,7 +293,7 @@ We need to define how ``itemgetter`` would behave, if just attempt to
 access the item and capture exceptions no matter which the object, or
 validate first if the object provides a ``get`` method and use it to
 retrieve the item with a default. See examples in the `About Possible
-Implementations <PEP 769 About Possible Implementations>`__ subsection
+Implementations <PEP 769 About Possible Implementations_>`__ subsection
 above.
 
 This would help performance for the case of dictionaries, but would make