Issue #3382: Make '%F' and float.__format__('F') convert results to upper case. Much of the patch came from Mark Dickinson.
diff --git a/Misc/NEWS b/Misc/NEWS
index 2d6b7f0..e5c8626 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@
Core and Builtins
-----------------
+- Issue #3382: 'F' formatting for float and complex now convert the
+ result to upper case. This only affects 'inf' and 'nan', since 'f'
+ no longer converts to 'g' for large values.
+
- Remove switch from "%f" formatting to "%g" formatting for floats
larger than 1e50 in absolute value.