fix: fix table rendered as heading (#3612)

* add tests

* add table interrupt to lheading

* fix comment

* fix redos in rule

src/rules.ts

@@ -85,13 +85,24 @@ const fences = /^ {0,3}(`{3,}(?=[^`\n]*(?:\n|$))|~{3,})([^\n]*)(?:\n|$)(?:|([\s\
 const hr = /^ {0,3}((?:-[\t ]*){3,}|(?:_[ \t]*){3,}|(?:\*[ \t]*){3,})(?:\n+|$)/;
 const heading = /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/;
 const bullet = /(?:[*+-]|\d{1,9}[.)])/;
-const lheading = edit(/^(?!bull |blockCode|fences|blockquote|heading|html)((?:.|\n(?!\s*?\n|bull |blockCode|fences|blockquote|heading|html))+?)\n {0,3}(=+|-+) *(?:\n+|$)/)
+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
   .replace(/blockCode/g, /(?: {4}| {0,3}\t)/) // indented code blocks can interrupt
   .replace(/fences/g, / {0,3}(?:`{3,}|~{3,})/) // fenced code blocks can interrupt
   .replace(/blockquote/g, / {0,3}>/) // blockquote can interrupt
   .replace(/heading/g, / {0,3}#{1,6}/) // ATX heading can interrupt
   .replace(/html/g, / {0,3}<[^\n>]+>\n/) // block html can interrupt
+  .replace(/\|table/g, '') // table not in commonmark
+  .getRegex();
+const lheadingGfm = edit(lheadingCore)
+  .replace(/bull/g, bullet) // lists can interrupt
+  .replace(/blockCode/g, /(?: {4}| {0,3}\t)/) // indented code blocks can interrupt
+  .replace(/fences/g, / {0,3}(?:`{3,}|~{3,})/) // fenced code blocks can interrupt
+  .replace(/blockquote/g, / {0,3}>/) // blockquote can interrupt
+  .replace(/heading/g, / {0,3}#{1,6}/) // ATX heading can interrupt
+  .replace(/html/g, / {0,3}<[^\n>]+>\n/) // block html can interrupt
+  .replace(/table/g, / {0,3}\|?(?:[:\- ]*\|)+[\:\- ]*\n/) // table can interrupt
   .getRegex();
 const _paragraph = /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html|table| +\n)[^\n]+)*)/;
 const blockText = /^[^\n]+/;
@@ -186,6 +197,7 @@ const gfmTable = edit(
 
 const blockGfm: Record<BlockKeys, RegExp> = {
   ...blockNormal,
+  lheading: lheadingGfm,
   table: gfmTable,
   paragraph: edit(_paragraph)
     .replace('hr', hr)

test/specs/new/hr_following_nptables.html

@@ -17,3 +17,44 @@
   </tbody>
 </table>
 <hr>
+
+<table>
+  <thead>
+    <tr>
+      <th>abc</th>
+      <th>def</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>bar</td>
+      <td>foo</td>
+    </tr>
+    <tr>
+      <td>baz</td>
+      <td>boo</td>
+    </tr>
+  </tbody>
+</table>
+<hr>
+
+<p>text then table</p>
+<table>
+  <thead>
+    <tr>
+      <th>abc</th>
+      <th>def</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>bar</td>
+      <td>foo</td>
+    </tr>
+    <tr>
+      <td>baz</td>
+      <td>boo</td>
+    </tr>
+  </tbody>
+</table>
+<hr>

test/specs/new/hr_following_nptables.md

@@ -3,3 +3,16 @@
  bar | foo
  baz | boo
 ___
+
+ abc | def
+ --- | ---
+ bar | foo
+ baz | boo
+---
+
+text then table
+ abc | def
+ --- | ---
+ bar | foo
+ baz | boo
+---

test/specs/new/hr_following_tables.html

@@ -17,3 +17,44 @@
   </tbody>
 </table>
 <hr>
+
+<table>
+  <thead>
+    <tr>
+      <th>abc</th>
+      <th>def</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>bar</td>
+      <td>foo</td>
+    </tr>
+    <tr>
+      <td>baz</td>
+      <td>boo</td>
+    </tr>
+  </tbody>
+</table>
+<hr>
+
+<p>text then table</p>
+<table>
+  <thead>
+    <tr>
+      <th>abc</th>
+      <th>def</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td>bar</td>
+      <td>foo</td>
+    </tr>
+    <tr>
+      <td>baz</td>
+      <td>boo</td>
+    </tr>
+  </tbody>
+</table>
+<hr>

test/specs/new/hr_following_tables.md

@@ -3,3 +3,16 @@
 | bar | foo |
 | baz | boo |
 ___
+
+| abc | def |
+| --- | --- |
+| bar | foo |
+| baz | boo |
+---
+
+text then table
+| abc | def |
+| --- | --- |
+| bar | foo |
+| baz | boo |
+---