fixed missing '[[' when dash is the default shell
fixed missing '[[' when dash is the default shell

mozilla/pad,sciflow/pad,floatingatoll/pad,sciflow/pad,mozilla/pad,floatingatoll/pad,mozilla/pad,ether/pad,sciflow/pad,ether/pad,mozilla/pad,mozilla/pad,floatingatoll/pad,ether/pad,ether/pad,ether/pad,floatingatoll/pad,floatingatoll/pad,sciflow/pad