I try to edit a question how to find the commit message by author?
In the question a word "hello" is there.
But in the edit the word is not appearing.
An extra word
[git] is also appearing in title of edit area.
The "hello" is being removed automatically, there's a filter that removes silly stuff like that. The filter runs both when you first submit the question and when you edit it, the reason that "hello" wasn't removed in the question in question is because it was originally posted on Nov 30 '10, which is before the filter was implemented.
No idea about