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Just FYI, Vedran, almost everyone gets this one wrong :) I too once thought that triple quoted text used as comments was bad style, but in fact I learned they are an accepted way in Python to do multiline comments. Accepted by Guido, at least: https://sgillies.net/2017/05/30/python-multi-line-comments-and-triple-quoted-strings.html :) It is not a common practice, though, in my observation, since most code editors support automatically prefixing and unprefixing a block with '#' characters, and highlight such blocks as comments while they do not highlight strings used as comments as comments.
It is an interesting observation that to use it to comment out a block of code one should use the raw string version. Hopefully the existence of this issue will make that slightly more discoverable.