[123XieC]

Description

When AnyDoc converts an EPUB table containing code such as a|b, the generated Markdown table treats the pipe as a column separator. The cell after the code can disappear. Escape each pipe inside a code span emitted directly in a table cell, including a code block converted to a span. A source backslash is preserved because the table parser consumes the added escape.

Human Involvement

• This PR was generated entirely by AI agents without human participation in the loop

Related Issue

Fixes #7689.

Type of Change

• Bug fix

Testing

• A generated EPUB goes through the real AnyDocConverter in test_epub_table_preserves_pipes_in_inline_and_block_code. The regression failed on the branch base.
• Ran pytest -o addopts='' -q tests/parse/test_anydoc_table_code.py tests/parse/test_anydoc_note_anchor_links.py tests/parse/test_directory_parser_routing.py tests/parse/test_document_parser_threading.py (29 passed). Also rendered the fixture with cmark-gfm and markdown-it-py, checking both columns and the source backslash.
• Ruff lint and mypy passed on both changed files. The new test passes Ruff format. The renderer has the same eight pre-existing format hunks on the base and after this patch.

[r266-tech]

Independent check at 842f7b0a5f87761dfc08d1d0641cebd4b85c26ba: the fix preserves both columns and the exact code text for direct inline code, a direct code block, and code inside a link. I compared 20 generated EPUB rows through the real AnyDocConverter and markdown-it-py's table renderer: all 12 variants in those three shapes pass, including a source backslash and embedded backticks. The four test files listed in the PR also pass locally (29 passed).

A remaining pre-existing case is code nested in a list or quote within the cell:

<tr><td><ul><li><code>a|b</code></li></ul></td><td>choice</td></tr>
<tr><td><blockquote><p><code>a|b</code></p></blockquote></td><td>choice</td></tr>

AnyDoc retains these as list / block_quote blocks. On both the base and this head, the renderer emits:

| - `a|b` | choice |
| `a|b` | choice |

The table reader splits at the inner pipe and drops choice. The source-backslash variants also fail exact code preservation. _render_cell sends these two block kinds through _render_list / _render_blocks, which render their nested inlines with block context, so the new table_cell escaping does not reach them.

This could be covered here or in a follow-up by preserving table context through nested cell content; the direct-cell change itself fixes the reported reproduction. I found no regression in the 20-row comparison (base 0/20 exact-preservation checks, PR 12/20).

AI-only local verification on macOS arm64 / Python 3.14.10, firecrawl-anydoc==0.2.4 and markdown-it-py==4.0.0. No model calls, remote server, browser rendering or hosted CI run.