3

As you know, when you edit a post in SE communities (like SO), sometimes your edition will be a new version, and sometimes else the current post will be just updated.

According to some tests, I figured it out:

  • when there is a comment under the post after the last version, it will create a new version if you edit the post.

  • When 10 minutes passed since the last edition, then it will create a new version if you edit the post.

Anything else?

2

That's about it. Edits by other people also cause a new revision, and the so-called lasts 5 minutes, not 10, and comments also end the grace period if they are quickly deleted (which might lead to confusion). Votes and flags do not count, and neither do deleting and undeleting your post.

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