Can't escape ( or ) inside [[..]] SH-1029
Anti-pattern
Major
You don't have to -- and can't -- escape ( or ) inside a [[ .. ]] expression like you do in [ .. ].
It is recommended remove the escaping.
Problematic code:
[[ -e ~/.bashrc -a \( -x /bin/dash -o -x /bin/ash \) ]]
Correct code:
[[ -e ~/.bashrc -a ( -x /bin/dash -o -x /bin/ash ) ]]