moveUpButtonTitle.js

let moveUpButtonTitle = this.props.canMoveUp ? sprintf(
    /* translators: accessibility text. %1: current block position (number). %2: next block position (number) */
    __( 'Move up from row %1$s to row %2$s' ),
    order,
    order - 1
) : sprintf(
    /* translators: accessibility text. %d: block position (number) */
    __( 'Move up from row %d' ),
    order
);