Updates due to reviewer suggestions

Author: David Murphy

salt/modules/yumpkg.py

@@ -1060,9 +1060,7 @@ def list_upgrades(refresh=True, **kwargs):
 
     cmd = ["--quiet"]
     cmd.extend(options)
-    cmd.extend(
-        ["list", "upgrades" if _yum() in ("dnf", "dnf5") else "updates"]
-    )
+    cmd.extend(["list", "upgrades" if _yum() in ("dnf", "dnf5") else "updates"])
     out = _call_yum(cmd, ignore_retcode=True)
     if out["retcode"] != 0 and "Error:" in out:
         return {}
@@ -3505,7 +3503,7 @@ def services_need_restart(**kwargs):
 
         salt '*' pkg.services_need_restart
     """
-    if _yum() == "dnf":
+    if _yum() != "dnf":
         raise CommandExecutionError("dnf is required to list outdated services.")
     if not salt.utils.systemd.booted(__context__):
         raise CommandExecutionError("systemd is required to list outdated services.")