-@code{\override}, @code{\revert}. @code{\set}, and @code{\unset}
+@code{\override}, @code{\revert}, @code{\set}, and @code{\unset}
commands may be prefixed with @code{\once}. This causes such a
command to be effective only during the current musical
moment before the property reverts back to its previous value (this can
commands may be prefixed with @code{\once}. This causes such a
command to be effective only during the current musical
moment before the property reverts back to its previous value (this can