Markdown filter extraction/re-merge produces extra <ul> tag used in table cells.

*Created by: Kuro Kurosaka *

The attached file, ul-in-table-cell.md has a table cell that includes HTML unordered list element <ul>...</ul>. When tikal -x is applied to this file to generated the .md.xlf file, then tikal -m is applied to re-generated the .md file, the re-generated file has an extra <ul> tag.

• Original cell content: <ul><li>item1</li><li>item2</li></ul>
• Re-generated: <ul><ul><li>item1</li><li>item2</li></ul>