fix(syntax) fix syntax for ruby check

molecule/shared/tests/test_default.rb

@@ -53,13 +53,13 @@ end
 
 # Ensure disk check exists
 describe json('/etc/sensu/conf.d/sensu_masters/check_disk_usage.json') do
-  its(['checks','metrics_disk_usage','command') { should eq 'check-disk-usage.rb' }
+  its(['checks','metrics_disk_usage','command']) { should eq 'check-disk-usage.rb' }
   its(['checks','metrics_disk_usage','interval']) { should eq 120 }
 end
 
 # Ensure disk metrics exists
 describe json('/etc/sensu/conf.d/sensu_checks/metrics_disk_usage.json') do
-  its(['checks','metrics_disk_usage','command') { should eq 'metrics-disk-usage.rb' }
+  its(['checks','metrics_disk_usage','command']) { should eq 'metrics-disk-usage.rb' }
   its(['checks','metrics_disk_usage','interval']) { should eq 60 }
 end