User:JPxG/current-switcher
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This is a very simple script. Basically, what it does is add buttons to "contributions" pages, like Special:Contributions/JPxG or Special:MyContributions, which allow you to toggle displaying current contributions.
This is useful if you participate in a lot of discussions, and you want to see which of them have been responded to (i.e. which of your comments are no longer the current revision).