fix: address markdown renderer review findings

Restore the replaced pipeline's synthetic fence newline so a real trailing blank line inside a fence survives CodeBlock's display trim, and pin it plus header-only tables in the DOM-parity corpus. Route extractMarkdownPlainText through parseGfm so the grammar has one source. Document the fixture provenance check (all 46 fixtures reproduce byte-identically from react-markdown at 9e8101b800), the deliberate O(prefix) divergence memcmp, the per-arm scope of grammar consistency, the React 18 MathML namespace limitation, and the prefix-equivalence corpus constraint.
2026-08-06 14:58:33 +08:00
parent d1e4fb91d2
commit 31b99930d9
14 changed files with 152 additions and 21 deletions
@@ -279,7 +279,10 @@ function renderCode(node: Md.Code, key: Key, context: MarkdownRenderContext): Re
  return (
    <CodeBlock
      key={key}
-      code={node.value}
+      // The replaced hast pipeline appended one synthetic newline that
+      // CodeBlock's display trim removes; feeding the bare value would make
+      // that trim eat a REAL trailing blank line inside the fence instead.
+      code={`${node.value}\n`}
      lang={context.streaming ? undefined : lang}
      copyLabel={context.codeLabels?.copyLabel}
      copiedLabel={context.codeLabels?.copiedLabel}