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I’ve developed the habit of using the revision summary to indicate which changes I’ve made to the tags while retagging a question.

For instance, if the question originally had tags and it should be instead, I write the following in the revision summary:

Edited tags: -cocoa, -touch, +cocoa-touch

which I find useful (and potentially educational) for the OP and other editors.

On the other hand, when an editor doesn’t type a revision summary, Stack Overflow shows

User (timestamp) edited tags

with no indication of the difference between previous tags and the tags set by that edit.

Since there’s a limit on the number of tags, this difference would easily fit in the revision history list of that question. Could this be automatic in case the editor doesn’t fill the revision summary? Is it worth it?

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It does show added tag as green color in revision history, doesn't it enough? – YOU Apr 18 '11 at 5:20
@YOU Not for me. Does that depend on reputation? – Bavarious Apr 18 '11 at 5:21
@Bavarious - I don't think so, – YOU Apr 18 '11 at 5:22
@YOU I’m feeling dumb now. How did you get to that page? I couldn’t find a link in the original question/edit page. – Bavarious Apr 18 '11 at 5:26
@Bavarious, click "X mins ago" above your name on the question you edited. – YOU Apr 18 '11 at 5:27
@YOU Ha! Thanks. Should I remove this question? – Bavarious Apr 18 '11 at 5:28
@Bavarious, Imm, I am not sure, but probably I would just leave it. – YOU Apr 18 '11 at 5:31
Pre-filling the edit revision summary itself with tags changed would be separate to the highlighting, and the comments shouldn't negate that good idea – random Dec 29 '14 at 21:10

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