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Some folks have kindly offered workarounds below, but I'll second the need for this: Sometimes I don't want to get myself in a state where I'm 1 click away from editing the OP question, or posting a new answer. I just want to fiddle around with the OP's code to understand the problem, without any buttons being armed for posting.
@Haney it would be cool if people browsing the answers could load a snippet back into the snippet editor, just for testing and fiddling, without any intent to commit edits to the posted answer. The editor could be a nice environment for experimenting with other people's snippets, trying different values, etc.