For operations such as closing an issue or merging a PR, we would
display the success icon (a checkmark) in red and magenta colors,
respectively, to reflect the latest state of the record operated on
(red: closed; magenta: merged).
This was always confusing to me, seeing it both in code and in the UI,
because I'm instinctively thinking that it's a bug and have to remind
myself that it's by design.
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