This question already has an answer here:
Check this Mouse over effect within blockquote
I checked the revision for mouse over effect but no luck on it. how to do it? I'm not sure this is a bug.
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marked as duplicate by Aziz Shaikh, Bala, Shadow Dec 22 '14 at 7:43
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3
This is not a bug, it's a feature that's useful for puzzling sites, where you don't want to give away spoilers to people who want to figure answers out for themselves.
The syntax is >! at the beginning of a line.
Like this!
You can click "edit" on a post to view the Markdown that was used to create it.
Blockquotes, as I'm sure you know, simply don't have the exclamation mark.
Tada!
answered Dec 22 '14 at 4:35
