While searching through questions I have frequently noticed that the summary is taken up almost entirely by the code snippet or ASCII art that is part of the question. Here is an example:
I would argue that seeing the unformatted code is not very useful to you as you are browsing questions cursorily. It also prevents you from reading more of the actual prose, which helps you decide whether you can be of assistance to the asker.
Would you agree that replacing code snippets in the summary with a delimited ellipsis is a good idea?