"Ctrl D" is useful - deletes everything from cursor to the end of the segment. A function (with keyboard shortcut) that deletes to just before the last character (i.e. in most cases the full stop or other punctuation) would be a nifty addition. When I've finished translating/editing a segment I nearly always delete the remains of the suggested translation with CtrlD, and then retype the full stop.
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Nora Díaz
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