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lang-bash
for REGION in ${DISCOVERED}), then a leading or trailing space doesn't matter, it'll disappear during word splitting. So in that case, you might as well useDISCOVERED+=" us-east-1"etc. to append to it. But, seriously, it'd be much cleaner if you just used an array all the way, and would actually work even in the future if/when you need values that themselves contain whitespace or glob characters.