HDFFV-10408,10918 Add note

release_docs/RELEASE.txt

@@ -330,6 +330,14 @@ New Features
 
     Tools:
     ------
+    - h5repack was fixed to repack datasets with external storage
+      to other types of storage.
+
+      New test added to repack files and verify the correct data using h5diff.
+
+      (JS - 2019/09/25, HDFFV-10408)
+      (ADB - 2019/10/02, HDFFV-10918)
+
     - h5dump was fixed for 128-bit floats, but was missing a test.
 
       New test greps for the first 15 numbers of the 128-bit value.
@@ -364,7 +372,7 @@ Bug Fixes since HDF5-1.10.3 release
     -------
     - Fixed the iteration error in test_versionbounds() in test/dtypes.c
 
-      The test was supposed to loop through all valid combinations of 
+      The test was supposed to loop through all valid combinations of
       low and high bounds in the array versions[], but they were set to
       H5F_LIBVER_EARLIEST always without changing.