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TL;DR

The above is an example. I put it there intentionally. I see it at the top of a lot of Q's and A's on Main. What is it? Why is it there? Is it kbd shrtcut emoji kewl speak I just don't understand 'cause I'm older than 21? Or is it some indication of incompatible Markdown editors being used which generates interesting stray characters like that? Or is it something far more sinister, like Skynet flexing its muscles?

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TL; DR - Too long; Didn't read.

I probably couldn't phrase it better than @T.E.D. did in the comments:

Its basically Millennial for "The executive summary is..."

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  • Ah. Ok. Thanks... but then why would an OP put it at the top of their own Q? I checked the Edit history - no one added it later it was in the original version. Guess I still don't get it. Commented Oct 4, 2018 at 21:19
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    @KerryL I reckon it's just the equivalent of a precis at the start of an essay. Commented Oct 4, 2018 at 21:21
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    btw I have spent several days musing over something else that has been equally perplexing me... feel free to leave me perplexed. Is it "sempai scuba," "sempai's Cuba," "sempa is Cuba," none of the above (?) :-) Commented Oct 4, 2018 at 21:25
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    Its basically Millineal for "The executive summary is..." Commented Oct 4, 2018 at 21:27
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    @KerryL Sempai SCUBA (I'm also a diving instructor with the British Sub-Aqua Club). ;-) Commented Oct 4, 2018 at 21:47
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    @KerryL I put TL;DR at the top of my questions for anyone who doesn't have the time to read a long question and just needs to know my key points; it's popular on a lot of forums, and I just see it as being mindful. Commented Oct 5, 2018 at 10:13
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    @sempaiscuba - I've always read it as semper, I scuba ;-) Commented Oct 7, 2018 at 21:49
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    @TheHonRose SemperSCUBA would work too! ;-) Commented Oct 7, 2018 at 21:51

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