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I just fixed C. ciw doesn't work since I've only implemented vim stuff for now but I may slowly add in vim features if there is demand for them

Oh well, if you're fixing them, I've a couple more issues:

'^' goes to the first character in the line, not the first non-whitespace character

'o' is not undoable using 'u' (those most other things are, strangely)

Thanks!