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Add a copy feature to the navigator. It would bring up an option to copy as either as HTML or text (tab or space indented). This would be really handy with 118464 (navigate the entire project) - a quick and easy way to get a map of your whole codebase.
I think the right way to solve this is to use the clipboard architecture: it lets you export multiple data flavors; one could be plain text, one could be HTML. Paste clients (word processors etc.) then inspect the clipboard data flavors and grab the one they want. Thus, what really needs to be done is for the navigator to provide a transferhandler. This is a generic navigator feature, nothing Ruby specific (and should work for all languages). I'm reassigning this to the navigator category.