fix: fix html following list (#3444)

src/Tokenizer.ts

@@ -305,6 +305,7 @@ export class _Tokenizer {
           const hrRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}((?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$)`);
           const fencesBeginRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}(?:\`\`\`|~~~)`);
           const headingBeginRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}#`);
+          const htmlBeginRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}<[a-z].*>`, 'i');
 
           // Check if following lines should be included in List Item
           while (src) {
@@ -330,6 +331,11 @@ export class _Tokenizer {
               break;
             }
 
+            // End list item if found start of html block
+            if (htmlBeginRegex.test(nextLine)) {
+              break;
+            }
+
             // End list item if found start of new bullet
             if (nextBulletRegex.test(nextLine)) {
               break;

test/specs/new/html_following_list.html

@@ -0,0 +1,7 @@
+<ul>
+  <li>list item 1</li>
+  <li>list item 2</li>
+</ul>
+<div class="some-class">
+Content
+</div>

test/specs/new/html_following_list.md

@@ -0,0 +1,5 @@
+- list item 1
+- list item 2
+<div class="some-class">
+Content
+</div>