Update MD032/blanks-around-lists to ignore (end-appended) undefined reference tokens when determining the last line of a list (fixes #1453).

Author: DavidAnson

helpers/micromark-helpers.cjs

@@ -78,12 +78,11 @@ function addRangeToSet(set, start, end) {
  * Filter a list of Micromark tokens by predicate.
  *
  * @param {Token[]} tokens Micromark tokens.
- * @param {AllowedPredicate} [allowed] Allowed token predicate.
+ * @param {AllowedPredicate} allowed Allowed token predicate.
  * @param {TransformPredicate} [transformChildren] Transform predicate.
  * @returns {Token[]} Filtered tokens.
  */
 function filterByPredicate(tokens, allowed, transformChildren) {
-  allowed = allowed || (() => true);
   const result = [];
   const queue = [
     {
@@ -278,7 +277,11 @@ const nonContentTokens = new Set([
   "lineEnding",
   "lineEndingBlank",
   "linePrefix",
-  "listItemIndent"
+  "listItemIndent",
+  "undefinedReference",
+  "undefinedReferenceCollapsed",
+  "undefinedReferenceFull",
+  "undefinedReferenceShortcut"
 ]);
 
 module.exports = {

lib/md032.mjs

@@ -45,13 +45,14 @@ export default {
       }
 
       // Find the "visual" end of the list
+      const flattenedChildren = filterByPredicate(
+        list.children,
+        (token) => !nonContentTokens.has(token.type),
+        (token) => nonContentTokens.has(token.type) ? [] : token.children
+      );
       let endLine = list.endLine;
-      const flattenedChildren = filterByPredicate(list.children);
-      for (const child of flattenedChildren.reverse()) {
-        if (!nonContentTokens.has(child.type)) {
-          endLine = child.endLine;
-          break;
-        }
+      if (flattenedChildren.length > 0) {
+        endLine = flattenedChildren[flattenedChildren.length - 1].endLine;
       }
 
       // Look for a blank line below the list

test/lists_without_blank_lines.md

@@ -88,6 +88,11 @@ text
 
 <p>* Not a list</p>
 
+1. Undefined reference token
+   <pre>
+   [()]
+   </pre>
+
 <!-- markdownlint-configure-file {
   "no-inline-html": false,
   "ul-style": false,

test/snapshots/markdownlint-test-scenarios.mjs.md

@@ -37346,7 +37346,7 @@ Generated by [AVA](https://avajs.dev).
             insertText: `␊
             `,
           },
-          lineNumber: 98,
+          lineNumber: 103,
           ruleDescription: 'Files should end with a single newline character',
           ruleInformation: 'https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/md047.md',
           ruleNames: [
@@ -37457,6 +37457,11 @@ Generated by [AVA](https://avajs.dev).
       ␊
       <p>* Not a list</p>␊
       ␊
+      1. Undefined reference token␊
+         <pre>␊
+         [()]␊
+         </pre>␊
+      ␊
       <!-- markdownlint-configure-file {␊
         "no-inline-html": false,␊
         "ul-style": false,␊