*{.sh,run}: use shorter `test` instead of `test -n` and `test !` instead of `test -z` (http://www.gnu.org/software/bash/manual/bash.html#Bourne-Shell-Builtins > test)
*{.sh,run}: use shorter `test` instead of `test -n` and `test !` instead of `test -z` (http://www.gnu.org/software/bash/manual/bash.html#Bourne-Shell-Builtins > test)