Module parser/rules/block/table-block

Block rule for the explicit block-syntax table: [[table]][[row]][[cell]]...[[/cell]][[/row]][[/table]].

This is the structured alternative to the pipe-syntax table (||). Each element carries optional HTML attributes:

[[table class="wiki-table"]]
  [[row]]
    [[hcell style="width: 50%"]]Header[[/hcell]]
    [[cell colspan="2"]]Data[[/cell]]
  [[/row]]
[[/table]]
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Key details:

• [[hcell]] produces header cells (<th>), [[cell]] produces data cells (<td>).
• colspan is extracted from cell attributes and mapped to column-span.
• Alignment can be derived from the style attribute's text-align value.
• Cell content supports both block and inline elements, including nested tables. The custom parseCellContent() handles paragraph wrapping and block detection within cells.
• Empty tables or tables with only empty rows fail the rule, falling back to text rendering.
• The table element carries _source: "block" in attributes to distinguish it from pipe-syntax tables.