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358 lines
6.9 KiB
358 lines
6.9 KiB
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# Tables
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With the flag `MD_FLAG_TABLES`, MD4C enables extension for recognition of
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tables.
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Basic table example of a table with two columns and three lines (when not
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counting the header) is as follows:
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```````````````````````````````` example
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| Column 1 | Column 2 |
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|----------|----------|
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| foo | bar |
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| baz | qux |
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| quux | quuz |
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td>foo</td><td>bar</td></tr>
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<tr><td>baz</td><td>qux</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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The leading and succeeding pipe characters (`|`) on each line are optional:
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```````````````````````````````` example
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Column 1 | Column 2 |
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---------|--------- |
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foo | bar |
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baz | qux |
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quux | quuz |
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td>foo</td><td>bar</td></tr>
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<tr><td>baz</td><td>qux</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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```````````````````````````````` example
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| Column 1 | Column 2
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|----------|---------
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| foo | bar
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| baz | qux
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| quux | quuz
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td>foo</td><td>bar</td></tr>
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<tr><td>baz</td><td>qux</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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```````````````````````````````` example
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Column 1 | Column 2
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---------|---------
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foo | bar
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baz | qux
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quux | quuz
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td>foo</td><td>bar</td></tr>
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<tr><td>baz</td><td>qux</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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However for one-column table, at least one pipe has to be used in the table
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header underline, otherwise it would be parsed as a Setext title followed by
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a paragraph.
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```````````````````````````````` example
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Column 1
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--------
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foo
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baz
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quux
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.
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<h2>Column 1</h2>
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<p>foo
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baz
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quux</p>
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````````````````````````````````
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Leading and trailing whitespace in a table cell is ignored and the columns do
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not need to be aligned.
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```````````````````````````````` example
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Column 1 |Column 2
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---|---
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foo | bar
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baz| qux
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quux|quuz
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td>foo</td><td>bar</td></tr>
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<tr><td>baz</td><td>qux</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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The table cannot interrupt a paragraph.
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```````````````````````````````` example
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Lorem ipsum dolor sit amet.
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| Column 1 | Column 2
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| ---------|---------
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| foo | bar
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| baz | qux
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| quux | quuz
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.
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<p>Lorem ipsum dolor sit amet.
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| Column 1 | Column 2
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| ---------|---------
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| foo | bar
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| baz | qux
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| quux | quuz</p>
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````````````````````````````````
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Similarly, paragraph cannot interrupt a table:
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```````````````````````````````` example
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Column 1 | Column 2
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---------|---------
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foo | bar
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baz | qux
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quux | quuz
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Lorem ipsum dolor sit amet.
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td>foo</td><td>bar</td></tr>
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<tr><td>baz</td><td>qux</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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<tr><td>Lorem ipsum dolor sit amet.</td><td></td></tr>
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</tbody>
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</table>
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````````````````````````````````
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The first, the last or both the first and the last dash in each column
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underline can be replaced with a colon (`:`) to request left, right or middle
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alignment of the respective column:
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```````````````````````````````` example
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| Column 1 | Column 2 | Column 3 | Column 4 |
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|----------|:---------|:--------:|---------:|
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| default | left | center | right |
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th align="left">Column 2</th><th align="center">Column 3</th><th align="right">Column 4</th></tr>
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</thead>
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<tbody>
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<tr><td>default</td><td align="left">left</td><td align="center">center</td><td align="right">right</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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To include a literal pipe character in any cell, it has to be escaped.
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```````````````````````````````` example
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Column 1 | Column 2
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---------|---------
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foo | bar
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baz | qux \| xyzzy
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quux | quuz
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td>foo</td><td>bar</td></tr>
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<tr><td>baz</td><td>qux | xyzzy</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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Contents of each cell is parsed as an inline text which may contents any
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inline Markdown spans like emphasis, strong emphasis, links etc.
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```````````````````````````````` example
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Column 1 | Column 2
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---------|---------
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*foo* | bar
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**baz** | [qux]
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quux | [quuz](/url2)
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[qux]: /url
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td><em>foo</em></td><td>bar</td></tr>
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<tr><td><strong>baz</strong></td><td><a href="/url">qux</a></td></tr>
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<tr><td>quux</td><td><a href="/url2">quuz</a></td></tr>
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</tbody>
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</table>
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````````````````````````````````
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However pipes which are inside a code span are not recognized as cell
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boundaries.
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```````````````````````````````` example
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Column 1 | Column 2
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---------|---------
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`foo | bar`
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baz | qux
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quux | quuz
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.
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<table>
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<thead>
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<tr><th>Column 1</th><th>Column 2</th></tr>
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</thead>
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<tbody>
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<tr><td><code>foo | bar</code></td><td></td></tr>
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<tr><td>baz</td><td>qux</td></tr>
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<tr><td>quux</td><td>quuz</td></tr>
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</tbody>
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</table>
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````````````````````````````````
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## GitHub Issues
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### [Issue 41](https://github.com/mity/md4c/issues/41)
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```````````````````````````````` example
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* x|x
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---|---
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.
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<ul>
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<li>x|x
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---|---</li>
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</ul>
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````````````````````````````````
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(Not a table, because the underline has wrong indentation and is not part of the
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list item.)
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```````````````````````````````` example
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* x|x
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---|---
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x|x
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.
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<ul>
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<li><table>
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<thead>
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<tr>
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<th>x</th>
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<th>x</th>
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</tr>
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</thead>
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</table>
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</li>
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</ul>
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<p>x|x</p>
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````````````````````````````````
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(Here the underline has the right indentation so the table is detected.
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But the last line is not part of it due its indentation.)
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### [Issue 42](https://github.com/mity/md4c/issues/42)
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```````````````````````````````` example
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] http://x.x *x*
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|x|x|
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|---|---|
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|x|
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.
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<p>] http://x.x <em>x</em></p>
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<table>
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<thead>
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<tr>
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<th>x</th>
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<th>x</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>x</td>
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<td></td>
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</tr>
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</tbody>
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</table>
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````````````````````````````````
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### [Issue 104](https://github.com/mity/md4c/issues/104)
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```````````````````````````````` example
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A | B
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--- | ---
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[x](url)
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.
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<table>
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<thead>
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<tr>
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<th>A</th>
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<th>B</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><a href="url">x</a></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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````````````````````````````````
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### [Issue 138](https://github.com/mity/md4c/issues/138)
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```````````````````````````````` example
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| abc | def |
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| --- | --- |
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<table>
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<thead>
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<tr>
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<th>abc</th>
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<th>def</th>
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</tr>
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</thead>
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</table>
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````````````````````````````````
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