made POSIX shell compliant

Joel Grunbaum

2020-10-13 9958c86a813918704dede9a7c0920ccb4eb5c55b

 all-shells/.commonshell

@@ -1,5 +1,5 @@
#aliases
if [[ "$OSTYPE" == "darwin"* ]]; then
if [ -z "${OSTYPE##*darwin*}" ]; then
   #Mac OSX specific versions
   alias ls="ls -G"
else