See following example:
$ echo ${.sh.version}
Version JM 93u+ 2012-05-31
$ cat << END
> ${.sh.version}
> END
ksh.120531.93u+: cat: not found [No such file or directory]
$
Other .sh vars like ${.sh.fun} have the same problem. ksh93u
(2011-02-08) behaves the same.
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