This is a stack exchange markup question. When I add a URL to another post such as:
Stackexchange auto updates the URL to display the question title. I know that a way exists to do this in comments, but can't figure it out.
As far as I know, there is nothing automatic. You have to insert an inline markdown link yourself. (If there is a better way, I will feel silly, since I've been doing it the tedious way.)
(Exception: when you mark a post as a duplicate, the appropriate comment is generated automatically with the title rather than raw URL.)