correct changed import

Doc/library/reprlib.rst

@@ -118,10 +118,10 @@ The use of dynamic dispatching by :meth:`Repr.repr1` allows subclasses of
 the handling of types already supported. This example shows how special support
 for file objects could be added::
 
-   import repr
+   import reprlib
    import sys
 
-   class MyRepr(repr.Repr):
+   class MyRepr(reprlib.Repr):
        def repr_file(self, obj, level):
            if obj.name in ['<stdin>', '<stdout>', '<stderr>']:
                return obj.name