doc: clarify the cp --reflink NEWS

* NEWS: Remove the description associated with the removed
experimental code which unconditionally tried to reflink() on copy.
Also clarify where --reflink works exactly.

diff --git a/NEWS b/NEWS
index a88546d..85cc82b 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -45,14 +45,11 @@ GNU coreutils NEWS                                    -*- outline -*-
   chroot now accepts the options --userspec and --groups.
 
   cp accepts a new option, --reflink: create a lightweight copy
-  using copy-on-write (COW).  This is currently supported only on
-  btrfs file systems.
+  using copy-on-write (COW).  This is currently only supported within
+  a btrfs file system.
 
   cp now preserves time stamps on symbolic links, when possible
 
-  cp, install, mv: take advantage of btrfs' O(1) copy-on-write feature
-  when both the source and destination are on the same btrfs partition.
-
   sort accepts a new option, --human-numeric-sort (-h): sort numbers
   while honoring human readable suffixes like KiB and MB etc.