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How about a command for closing whatever tag is open where the cursor is? For repeating the last closed tag? For wrapping a tag in another tag?

I'm an emacs noob but it seems like the tools for actually working with existing markup are impoverished. You only write markup once; you have to maintain it forever.

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> How about a command for closing whatever tag is open where the cursor is?

Try `C-h m` to find out what commands your HTML editing mode provides. In HTML Mode, `C-c /` closes the current element, and in nxml mode, `C-c C-f` does the same thing. Even better, in nxml mode, when `nxml-slash-auto-complete-flag` is non-nil the current element is automatically closed when you type a "/".

The nice thing about Emacs is that it's pretty trivial to write a little elisp code to add the other functionality you're looking for.

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