clarify assert logic

Author: sjpb

molecule/test13/verify.yml

@@ -13,7 +13,7 @@
     command: scontrol show config
     register: slurm_config
   - assert:
-      that: "item in slurm_config.stdout_lines | map('replace', ' ', '')"
+      that: "item in (slurm_config.stdout_lines | map('replace', ' ', ''))"
       fail_msg: "FAILED - {{ item }} not found in slurm config"
     loop:
       - SlurmctldSyslogDebug=error