is_aws_stdout_pipe() used rfind over whitespace tokens, so a value-taking
option after the '-' destination (e.g. 'aws s3 cp s3://b/k - --request-payer
requester') made the check miss and the streamed object body was rewritten
by strip_transfer_progress/JSON compaction. Any bare '-' token now forces
passthrough; a false positive only skips minimization. Also moved the
changelog entries back under '## [Unreleased]' after they slid beneath
released headings during the rebase onto main.
Addresses review feedback on #2176.
can1357
96e66923ce