chore: remove 'upstream' references from comments

Author: johanrd

lib/rules/template-require-iframe-title.js

@@ -10,8 +10,8 @@ module.exports = {
     },
     schema: [],
     messages: {
-      // Split from a single `missingTitle` into four messageIds aligned with
-      // upstream ember-template-lint, providing richer diagnostic detail.
+      // Four messageIds (missingTitle, emptyTitle, dynamicFalseTitle,
+      // duplicateTitle) for richer diagnostic detail.
       missingTitle: '<iframe> elements must have a unique title property.',
       emptyTitle: '<iframe> elements must have a unique title property.',
       dynamicFalseTitle: '<iframe> elements must have a unique title property.',
@@ -61,20 +61,19 @@ module.exports = {
               if (value.length === 0) {
                 context.report({ node, messageId: 'emptyTitle' });
               } else {
-                // Check for duplicate titles. Upstream reports BOTH the
-                // first and the current occurrence of a duplicated title
-                // on every collision, sharing a `#N` index so users can
-                // correlate them. For three or more duplicates the first
-                // occurrence is therefore re-reported once per collision.
+                // Check for duplicate titles. Reports BOTH the first and the
+                // current occurrence on every collision, sharing a `#N` index
+                // so users can correlate them. For three or more duplicates
+                // the first occurrence is therefore re-reported once per
+                // collision.
                 const existing = knownTitles.find((entry) => entry.value === value);
                 if (existing) {
                   if (existing.index === null) {
                     existing.index = nextDuplicateIndex++;
                   }
                   const index = existing.index;
 
-                  // Report on the first occurrence on every collision,
-                  // matching upstream ember-template-lint behavior.
+                  // Report on the first occurrence on every collision.
                   context.report({
                     node: existing.node,
                     messageId: 'duplicateTitleFirst',

tests/lib/rules/template-require-iframe-title.js

@@ -32,7 +32,7 @@ ruleTester.run('template-require-iframe-title', rule, {
     },
 
     {
-      // Upstream reports BOTH occurrences with a shared `#N` index.
+      // Both occurrences are reported with a shared `#N` index.
       code: '<template><iframe title="foo" /><iframe title="foo" /></template>',
       output: null,
       errors: [
@@ -44,7 +44,7 @@ ruleTester.run('template-require-iframe-title', rule, {
       ],
     },
     {
-      // Three duplicates → upstream re-reports the first occurrence on every
+      // Three duplicates → the first occurrence is re-reported on every
       // collision, so iframe #1 is flagged twice (once per later collision)
       // and iframes #2 and #3 are each flagged once. ESLint sorts by source
       // location, so the two first-occurrence reports (same location) come
@@ -136,7 +136,7 @@ hbsRuleTester.run('template-require-iframe-title', rule, {
       ],
     },
     {
-      // Three duplicates: upstream re-reports the first occurrence on every
+      // Three duplicates: the first occurrence is re-reported on every
       // collision, so iframe #1 is flagged twice and each later iframe once.
       code: '<iframe title="foo" /><iframe title="foo" /><iframe title="foo" />',
       output: null,