Lists and quotations located in a table cell are not preserved in CommonMark Markdown 1.2

Markdown table cells can only contain inline content, so block content located in a table cell is rendered as text separated by line breaks (<br/>) when rendering to markdown/1.2. Some of this content isn't preserved or isn't stable:

• a list in a cell is rendered as "* item" text, which is escaped as "\* item" on the next conversion
• nested lists in a cell lose their nesting
• the lines of a quotation in a cell are joined
• a list item followed by a quotation in a cell loses the separator between them ("a" and "q" become "aq")

Example (xwiki/2.1):

|(((
* a
** b

> q1
> q2
)))|c