Test cases from Cowlishaw, v2.57. All are pased cleanly.
diff --git a/Lib/test/decimaltestdata/dsBase.decTest b/Lib/test/decimaltestdata/dsBase.decTest
index d0632fd..e2fb4ba 100644
--- a/Lib/test/decimaltestdata/dsBase.decTest
+++ b/Lib/test/decimaltestdata/dsBase.decTest
@@ -17,7 +17,7 @@
-- IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK --
-- mfc@uk.ibm.com --
------------------------------------------------------------------------
-version: 2.56
+version: 2.57
-- This file tests base conversions from string to a decimal number
-- and back to a string (in Scientific form)
@@ -1058,4 +1058,5 @@
dsbas1107 toSci +1E-383 -> 0E-101 Inexact Rounded Subnormal Underflow Clamped
dsbas1108 toSci +9.999999999999999E+384 -> Infinity Overflow Inexact Rounded
-
+-- narrowing case
+dsbas1110 toSci 2.000000000000000E-99 -> 2.00E-99 Rounded Subnormal