Slightly safer .test/config.sh

Author: tianon

.test/config.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
-# https://github.com/docker-library/official-images/blob/618a85a87796c8bbea059011d94d888dc7554158/test/config.sh
+# https://github.com/docker-library/official-images/blob/3bc6a70175d4e1da2080b86415e6f3c8eb2c6af3/test/config.sh
 
-imageTests+=(
-	[bash]='bash-optional-features'
-)
+imageTests[bash]+='
+	bash-optional-features
+'