15843 automation can fix many trailing whitespace cstyle nits
Reviewed by: Andy Fiddaman <illumos@fiddaman.net>
Approved by: Dan McDonald <danmcd@mnx.io>

15289 cmd: remove pragma ident
Reviewed by: Igor Kozhukhov <igor@dilos.org>
Reviewed by: Dan Cross <cross@oxidecomputer.com>
Approved by: Dan McDonald <danmcd@mnx.io>

6864230 hiho, hiho, it'ch chtime for CH to go
Portions contributed by Rich Lowe

6272066 gcc and cmd/oawk don't get along
6273850 gcc and cmd/setpgrp don't get along
6273941 gcc and cmd/ul don't get along

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