[clang-tools-extra] [clang-doc] add support for block commands in clang-doc html output (PR #101108)

[Paul Kirth via cfe-commits]

================
@@ -632,6 +633,19 @@ static std::unique_ptr<HTMLNode> genHTML(const CommentInfo &I) {
     return std::move(ParagraphComment);
   }
 
+  if (I.Kind == "BlockCommandComment") {
+    auto BlockComment = std::make_unique<TagNode>(HTMLTag::TAG_DIV);
+    BlockComment->Children.emplace_back(
+        std::make_unique<TagNode>(HTMLTag::TAG_DIV, I.Name));
+    for (const auto &Child : I.Children) {
+      std::unique_ptr<HTMLNode> Node = genHTML(*Child);
+      if (Node)
+        BlockComment->Children.emplace_back(std::move(Node));
----------------
ilovepi wrote:

```suggestion
      if(std::unique_ptr<HTMLNode> Node = genHTML(*Child))
        BlockComment->Children.emplace_back(std::move(Node));
```

https://github.com/llvm/llvm-project/pull/101108