Issue #6431:  Fix Fraction comparisons with unknown types, and with
float infinities and nans.  Backport of r74078 from py3k.
diff --git a/Misc/NEWS b/Misc/NEWS
index 263468e..da46c10 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -352,6 +352,10 @@
 Library
 -------
 
+- Issue #6431: Make Fraction type return NotImplemented when it doesn't
+  know how to handle a comparison without loss of precision.  Also add
+  correct handling of infinities and nans for comparisons with float.
+
 - Issue #6415: Fixed warnings.warn sagfault on bad formatted string.
 
 - Issue #6466: now distutils.cygwinccompiler and distutils.emxccompiler