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I have recently noticed two types of questions marked as duplicate, the both have [Duplicate] in the title, and they both have something like this at the bottom:

enter image description here

However the first one has this at the top:

enter image description here

And no extra automatically added code at the top if you go into Edit view. And the second has this at the top:

enter image description here

And Edit view reveals this added code at the top:

> **Possible Duplicate:**  
> [How to download a youtube video via terminal](http://askubuntu.com/questions/145558/how-to-download-a-youtube-video-via-terminal)


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So my question is this, what is the difference between the two Duplicate marked questions? Why does one have one thing added at the top with supposedly automated code, and other a cleaner look? Is the second one the old system or something?

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Is the second one the old system or something?

Yes.

In 2013, changes were made to "Close as duplicate". Presumably, the second question was closed before February 2013.

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