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I noticed that I can edit old revisions of a question. I don't want to use that feature just to learn what it's good for.

What's the purpose of that?

  • Can I beautify older revisions?
  • Can I mangle the edit history (like Git's rebasing)?

PS: I'm mainly active on Android Enthusiasts and also quite new to the site. This is a general meta question, so I ask here.

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2  
In short: unless you mean to Rollback to that revision, don't do that (Longer answer is already posted and accepted) – Shadow Wizard Jun 28 '12 at 10:09
up vote 16 down vote accepted

When you edit an old revision, it'll be copied over the current revision and becomes the new version of the post. It is a shortcut to rollback+edit.

I would have pointed you to How does editing work? but at the time of your question this particular information was not there yet; I've added it in.

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2  
Well, it's there now. :) – Shadow Wizard Jun 28 '12 at 9:55
    
/me whistles innocently. – Martijn Pieters Jun 28 '12 at 9:59
    
Yep I know - but now your last sentence is not relevant. :-) – Shadow Wizard Jun 28 '12 at 10:01
4  
@ShaWizDowArd: There, made your comment irrelevant instead. :-) – Martijn Pieters Jun 28 '12 at 10:04

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