The Heirloom Bourne Shell, http://heirloom.sourceforge.net/sh.html,
catches many non-portable shell constructs, such as $(), $(()), !, and
assignment in export statements.
The Heirloom Bourne Shell, http://heirloom.sourceforge.net/sh.html,
catches many non-portable shell constructs, such as $(), $(()), !, and
assignment in export statements.