# works as expected
(work)(~) $ echo /testing/{one,two}
/testing/one /testing/two


# does not work as expected
(work)(~) $ cat testing
folders="administrator/{backups,components,modules,templates} components" 
folders="${folders} images images/{banners,stories} languages mambots"
folders="${folders} mambots/{content,editors,editors-xtd,search,system}"
folders="${folders} media modules templates cache"

echo ${folders}
(work)(~) $ sh testing
administrator/{backups,components,modules,templates} components images images/{banners,stories} languages mambots mambots/{content,editors,editors-xtd,search,system} media modules templates cache