Collin Funk 3621ad2f71 cksum: promptly diagnose write errors ...

* src/cksum.c (output_file, digest_check): Check if standard output has
it's error flag set after printing.
* tests/misc/write-errors.sh: Add a test case that would previously run
forever.
* NEWS: Mention the improvement. Reorder alphabetically.

2026-01-10 12:42:13 -08:00

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