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Add rule MD056/table-column-count (fixes #92).

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David Anson 2024-01-04 23:07:55 -08:00
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# `MD056` - Table column count
Tags: `table`
Aliases: `table-column-count`
This rule is triggered when a [GitHub Flavored Markdown table][gfm-table-056]
does not have the same number of cells in every row.
This table's second data row has too few cells and its third data row has too
many cells:
```markdown
| Header | Header |
| ------ | ------ |
| Cell | Cell |
| Cell |
| Cell | Cell | Cell |
```
To fix these issues, ensure every row has the same number of cells:
```markdown
| Header | Header |
| ------ | ------ |
| Cell | Cell |
| Cell | Cell |
| Cell | Cell |
```
Note that a table's header row and its delimiter row must have the same number
of cells or it will not be recognized as a table (per specification).
Rationale: Extra cells in a row are usually not shown, so their data is lost.
Missing cells in a row create holes in the table and suggest an omission.
[gfm-table-056]: https://github.github.com/gfm/#tables-extension-