maint: fix description of tests/misc/io-errors.sh

* tests/misc/io-errors.sh: Promptness is checked in
write-errors.sh, not this test.

diff --git a/tests/misc/io-errors.sh b/tests/misc/io-errors.sh
index e1f03f595421bbd81c2352b262dbb8497d8b72e4..63649603ea491931bd0b8f8da87ceabacdc275c9 100755 (executable)
--- a/tests/misc/io-errors.sh
+++ b/tests/misc/io-errors.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Make sure all of these programs promptly diagnose write errors.
+# Make sure all of these programs diagnose write errors.
 
 # Copyright (C) 2025-2026 Free Software Foundation, Inc.