* Noteworthy changes in release 3.8 (2021-08-01) [stable]
** Incompatible changes
diff no longer treats a closed stdin as representing an absent file
in usage like 'diff --new-file - foo <&-'. This feature was rarely
if ever used and was not portable to POSIX platforms that reopen
stdin on exec, such as SELinux if the process underwent an AT_SECURE
transition, or HP-UX even if not setuid.
** Bug fixes
diff and related programs no longer get confused if stdin, stdout,
or stderr are closed. Previously, they sometimes opened files into
file descriptors 0, 1, or 2 and then mistakenly did I/O with them
that was intended for stdin, stdout, or stderr.
cmp, diff and sdiff no longer treat negative command-line
option-arguments as if they were large positive numbers.
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