diff --git a/Doc/library/traceback.rst b/Doc/library/traceback.rst
--- a/Doc/library/traceback.rst
+++ b/Doc/library/traceback.rst
@@ -302,9 +302,9 @@ capture data for later printing in a lightweight fashion.
       repetitions are shown, followed by a summary line stating the exact
       number of further repetitions.
 
-    .. versionchanged:: 3.6
+      .. versionchanged:: 3.6
 
-    Long sequences of repeated frames are now abbreviated.
+         Long sequences of repeated frames are now abbreviated.
 
 
 :class:`FrameSummary` Objects
diff --git a/Doc/whatsnew/3.6.rst b/Doc/whatsnew/3.6.rst
--- a/Doc/whatsnew/3.6.rst
+++ b/Doc/whatsnew/3.6.rst
@@ -207,8 +207,11 @@ Example of fatal error on buffer overflow using
 Other Language Changes
 ======================
 
-* None yet.
+Some smaller changes made to the core Python language are:
 
+* Long sequences of repeated traceback lines are now abbreviated as
+  ``"[Previous line repeated {count} more times]"``.
+  (Contributed by Emanuel Barry in :issue:`26823`.)
 
 New Modules
 ===========