bin/check-postgres-alive.rb in sensu-plugins-postgres-3.0.0 vs bin/check-postgres-alive.rb in sensu-plugins-postgres-4.0.0

@@ -1,6 +1,8 @@
 #! /usr/bin/env ruby
+# frozen_string_literal: true
+
 #
 #   check-postgres-alive
 #
 # DESCRIPTION:
 #
@@ -84,8 +86,8 @@
 
     ok "Server version: #{info}"
   rescue PG::Error => e
     critical "Error message: #{e.error.split("\n").first}"
   ensure
-    con.close if con
+    con&.close
   end
 end