Apply minor whitespace/syntax adjustments

test/config.sh

@@ -210,7 +210,6 @@ imageTests+=(
 	[wordpress:fpm]='
 		wordpress-fpm-run
 	'
-
 	[zookeeper]='
 		zookeeper-basics
 	'

test/tests/zookeeper-basics/run.sh

@@ -24,4 +24,4 @@ zkCli() {
 . "$dir/../../retry.sh" --tries "$ZOOKEEPER_TEST_TRIES" --sleep "$ZOOKEEPER_TEST_SLEEP" zkCli ls /
 
 # List Zokeeper root
-[[ "$(zkCli ls / | tail -n1)" == "[zookeeper]" ]]
+[ "$(zkCli ls / | tail -n1)" = '[zookeeper]' ]