wrong comment display (when sent by email)

I have just realized that GitHub displays wrong the comments that have been sent by email.

One sample would be https://github.com/jgm/pandoc/issues/1765#issuecomment-63205580. I received the email message and only the first paragraph should be displayed as a comment (it contains the required `>` in the message). The other two paragraphs are the actual reply (they aren’t formatted as comments in the email message).

Another sample is https://github.com/jgm/pandoc/issues/1612#issuecomment-59676779. In that case, the paragraphs after the last shown without expansion are considered comments. The original message has no comments in that paragraphs.

I think this is an important issue. Otherwise it is really hard to make a distinction between what has been replied and which the reply itself is.

首先，使用連結的兩個 GitHub 留言範例重現該行為，並將電子郵件文字與顯示的留言進行比較。追蹤 parser 如何區分引用內容與回覆，然後確認只有引用的段落會被視為留言，而實際回覆仍會以回覆文字顯示。

由索引模型根據 Issue 內容生成。