ctrl+_ to separate cells, ctrl+^ to separate rows - works perfectly in notepad++. I think the proposal can be improved by using ctrl+^ followed by a newline as

ctrl+_ to separate cells, ctrl+^ to separate rows - works perfectly in notepad++. I think the proposal can be improved by using ctrl+^ followed by a newline as a row separator, it looks much more readable plus will allow various line-based CLI tools to be used unless there are newlines in the cells.