doc: NEWS: mention fold can operate on very long lines

* NEWS: Before commit fb9016d50 (fold: use fread instead of getline,
2025-08-24), fold required that the maximum line size in a file fit into
memory. Document that this is no longer the case.

diff --git a/NEWS b/NEWS
index 392129dad24a5cbf3b269b631bacd6e300c59fea..ef423425b2f1b087b917287a9ff093309cba5576 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -38,6 +38,9 @@ GNU coreutils NEWS                                    -*- outline -*-
   precedence.  Previously multiple specifications would induce an error.
   [bug introduced in coreutils-5.90]
 
+  'fold' no longer exhausts memory when operating on very long lines.
+  [This bug was present in "the beginning".]
+
   'install -d' now produces the correct diagnostic upon failure
   to create a directory.  Previously it would have produced
   a confusing error about changing permissions.