fix: fix empty list item

src/rules.ts

@@ -96,7 +96,7 @@ const blockCode = /^((?: {4}| {0,3}\t)[^\n]+(?:\n(?:[ \t]*(?:\n|$))*)?)+/;
 const fences = /^ {0,3}(`{3,}(?=[^`\n]*(?:\n|$))|~{3,})([^\n]*)(?:\n|$)(?:|([\s\S]*?)(?:\n|$))(?: {0,3}\1[~`]* *(?=\n|$)|$)/;
 const hr = /^ {0,3}((?:-[\t ]*){3,}|(?:_[ \t]*){3,}|(?:\*[ \t]*){3,})(?:\n+|$)/;
 const heading = /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/;
-const bullet = /(?:[*+-]|\d{1,9}[.)])/;
+const bullet = / {0,3}(?:[*+-]|\d{1,9}[.)])/;
 const lheadingCore = /^(?!bull |blockCode|fences|blockquote|heading|html|table)((?:.|\n(?!\s*?\n|bull |blockCode|fences|blockquote|heading|html|table))+?)\n {0,3}(=+|-+) *(?:\n+|$)/;
 const lheading = edit(lheadingCore)
   .replace(/bull/g, bullet) // lists can interrupt
@@ -124,7 +124,7 @@ const def = edit(/^ {0,3}\[(label)\]: *(?:\n[ \t]*)?([^<\s][^\s]*|<.*?>)(?:(?: +
   .replace('title', /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/)
   .getRegex();
 
-const list = edit(/^( {0,3}bull)([ \t][^\n]+?)?(?:\n|$)/)
+const list = edit(/^(bull)([ \t][^\n]+?)?(?:\n|$)/)
   .replace(/bull/g, bullet)
   .getRegex();
 

test/specs/new/list_item_empty.html

@@ -0,0 +1,14 @@
+<ul>
+<li>
+<h2>title</h2>
+</li>
+</ul>
+<hr />
+<ul>
+<li>title
+<ul>
+<li>desc</li>
+<li></li>
+</ul>
+</li>
+</ul>

test/specs/new/list_item_empty.md

@@ -0,0 +1,8 @@
+- title
+    -
+
+---
+
+- title
+    - desc
+    -