Apply suggestion to spec/javascripts/test_bundle.js

spec/javascripts/test_bundle.js

@@ -23,7 +23,7 @@ let hasVueWarnings = false;
 Vue.config.warnHandler = (msg, vm, trace) => {
   // The following workaround is necessary, so we are able to use setProps from Vue test utils
   // see https://github.com/vuejs/vue-test-utils/issues/631#issuecomment-421108344
-  const currentStack = new Error('').stack;
+  const currentStack = new Error().stack;
   const isInVueTestUtils = currentStack
     .split('\n')
     .some(line => line.startsWith('    at VueWrapper.setProps ('));