Tests from marked:

.
| Heading 1 | Heading 2
| --------- | ---------
| Cell 1    | Cell 2
| Cell 3    | Cell 4
.
<table>
<thead>
<tr><th>Heading 1</th><th>Heading 2</th></tr>
</thead>
<tbody>
<tr><td>Cell 1</td><td>Cell 2</td></tr>
<tr><td>Cell 3</td><td>Cell 4</td></tr>
</tbody>
</table>
.

.
| Header 1 | Header 2 | Header 3 | Header 4 |
| :------: | -------: | :------- | -------- |
| Cell 1   | Cell 2   | Cell 3   | Cell 4   |
| Cell 5   | Cell 6   | Cell 7   | Cell 8   |
.
<table>
<thead>
<tr><th style="text-align:center">Header 1</th><th style="text-align:right">Header 2</th><th style="text-align:left">Header 3</th><th>Header 4</th></tr>
</thead>
<tbody>
<tr><td style="text-align:center">Cell 1</td><td style="text-align:right">Cell 2</td><td style="text-align:left">Cell 3</td><td>Cell 4</td></tr>
<tr><td style="text-align:center">Cell 5</td><td style="text-align:right">Cell 6</td><td style="text-align:left">Cell 7</td><td>Cell 8</td></tr>
</tbody>
</table>
.

.
Header 1 | Header 2
-------- | --------
Cell 1   | Cell 2
Cell 3   | Cell 4
.
<table>
<thead>
<tr><th>Header 1</th><th>Header 2</th></tr>
</thead>
<tbody>
<tr><td>Cell 1</td><td>Cell 2</td></tr>
<tr><td>Cell 3</td><td>Cell 4</td></tr>
</tbody>
</table>
.

.
Header 1|Header 2|Header 3|Header 4
:-------|:------:|-------:|--------
Cell 1  |Cell 2  |Cell 3  |Cell 4
*Cell 5*|Cell 6  |Cell 7  |Cell 8
.
<table>
<thead>
<tr><th style="text-align:left">Header 1</th><th style="text-align:center">Header 2</th><th style="text-align:right">Header 3</th><th>Header 4</th></tr>
</thead>
<tbody>
<tr><td style="text-align:left">Cell 1</td><td style="text-align:center">Cell 2</td><td style="text-align:right">Cell 3</td><td>Cell 4</td></tr>
<tr><td style="text-align:left"><em>Cell 5</em></td><td style="text-align:center">Cell 6</td><td style="text-align:right">Cell 7</td><td>Cell 8</td></tr>
</tbody>
</table>
.

Nested tables inside blockquotes:

.
> foo|foo
> ---|---
> bar|bar
baz|baz
.
<blockquote>
<table>
<thead>
<tr><th>foo</th><th>foo</th></tr>
</thead>
<tbody>
<tr><td>bar</td><td>bar</td></tr>
</tbody>
</table>
</blockquote>
<p>baz|baz</p>
.

Nested tables inside lists:

.
-   foo|foo
    ---|---
    bar|bar
   baz|baz
.
<ul>
<li><table>
<thead>
<tr><th>foo</th><th>foo</th></tr>
</thead>
<tbody>
<tr><td>bar</td><td>bar</td></tr>
</tbody>
</table>
</li>
</ul>
<p>baz|baz</p>
.

Minimal one-column table test:

.
| foo
|----
| test2
.
<table>
<thead>
<tr><th>foo</th></tr>
</thead>
<tbody>
<tr><td>test2</td></tr>
</tbody>
</table>
.