bin/125855: sh(1) allows for multiline, non-escaped control structures (and thus isn't POSIX compliant)

[Oliver Fromme]

Actually I think that both bash's and sh's behaviour is
correct.  As far as I can see in the refrenced standard
sections, there is no requirement that there must be no
newline character after the reserved word "!".  It seems
to be unspecified.

FWIW, Solaris' POSIX shell (/bin/ksh and /usr/xpg4/bin/sh)
allows a newline character, so it behaves the same as our
/bin/sh.  (Note that Solaris' /bin/sh is intentionally not
a POSIX shell, it doesn't know "!" at all.)

Best regards
   Oliver

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