Merge pull request #2495 from johanrd/fix/2469

Post-merge review of #2469 (`template-no-implicit-this`)

Author: NullVoxPopuli

lib/rules/template-no-element-event-actions.js

@@ -58,7 +58,10 @@ module.exports = {
             }
           } else {
             // Flag any mustache value on event attributes
-            if (attr.value?.type === 'GlimmerMustacheStatement') {
+            if (
+              attr.value?.type === 'GlimmerMustacheStatement' ||
+              attr.value?.type === 'GlimmerConcatStatement'
+            ) {
               context.report({ node: attr, messageId: 'noElementEventActions' });
             }
           }

lib/rules/template-no-implicit-this.js

@@ -26,6 +26,9 @@ const BUILT_INS = new Set([
   'textarea',
   'query-params',
   'unique-id',
+  // arg-less components/helpers from the default ember-cli blueprint
+  'welcome-page',
+  'rootURL',
 ]);
 
 // Control-flow built-ins whose params should not be flagged