Fix some documentation examples involving the repr of a float.
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 78a8a56..d297c78 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -90,7 +90,7 @@
    loss of precision by tracking multiple intermediate partial sums::
 
         >>> sum([.1, .1, .1, .1, .1, .1, .1, .1, .1, .1])
-        0.99999999999999989
+        0.9999999999999999
         >>> fsum([.1, .1, .1, .1, .1, .1, .1, .1, .1, .1])
         1.0