bpo-33065: Fix problem debugging user classes with __repr__ method (GH-24183)

If __repr__ uses instance attributes, as normal, and one steps
through the __init__ method, debugger may try to get repr before
the instance attributes exist.  reprlib.repr handles the error.
diff --git a/Lib/idlelib/NEWS.txt b/Lib/idlelib/NEWS.txt
index b04ea74..2620098 100644
--- a/Lib/idlelib/NEWS.txt
+++ b/Lib/idlelib/NEWS.txt
@@ -3,6 +3,8 @@
 ======================================
 
 
+bpo-33065: Fix problem debugging user classes with __repr__ method.
+
 bpo-32631: Finish zzdummy example extension module: make menu entries
 work; add docstrings and tests with 100% coverage.