This suggested edit was just approved by three (of 5) voters, which saddens me greatly. Not only is it poorly formatted (abuse of code formatting, inappropriate spacing between letters, lack of punctuation), it is also not a good description of the tag. Like the other person who voted to reject wrote, it tries to cram mostly-unrelated information about Symphony into a generic tag.
Oh well, I'll just roll it back. Great, I know how to do that…except I don't.
First, I tried to go to the tag wiki edit history, but the initial Community-created revision does not have the expected "rollback" link.
Then, I tried to manually roll back by editing the wiki and removing the text. But I can't do that—the system stomps on my hand and says that the "wiki excerpt is missing". Yes, I know that. That's the point.
Finally, I tried searching Meta, but all I found was this question, which indicates that the problem was already solved by adding the Community revision, which is precisely the one I was trying to roll back to.
I have plenty of rep to edit tag wikis, but yet I don't see the "rollback" link for this wiki or any others. What gives? Shouldn't users with full edit privileges also be able to roll back invalid edits?