Avoid breakage from IFS being reset in "run"

See https://github.com/sstephenson/bats/issues/89

test/test_helpers.bash

@@ -87,6 +87,7 @@ function prepare_web_container {
 	local -r options="$@"
 
 	local expose_option=""
+	IFS=$' \t\n' # See https://github.com/sstephenson/bats/issues/89
 	for port in $ports; do
 		expose_option="${expose_option}--expose=$port "
 	done
@@ -121,6 +122,7 @@ function prepare_web_container {
 	assert_success
 
 	# THEN querying directly port works
+	IFS=$' \t\n' # See https://github.com/sstephenson/bats/issues/89
 	for port in $ports; do
 		run retry 5 1s docker run --rm appropriate/curl --silent --fail http://$(docker_ip $container_name):$port/data
 		assert_output "answer from port $port"