···142142 provided with '--if-exists' overrides the `trailer.ifExists` and any
143143 applicable `trailer.<keyAlias>.ifExists` configuration variables
144144 and applies to all '--trailer' options until the next occurrence of
145145- '--if-exists' or '--no-if-exists'. Upon encountering '--no-if-exists, clear the
146146- effect of any previous use of '--if-exists, such that the relevant configuration
145145+ '--if-exists' or '--no-if-exists'. Upon encountering '--no-if-exists', clear the
146146+ effect of any previous use of '--if-exists', such that the relevant configuration
147147 variables are no longer overridden. Possible actions are `addIfDifferent`,
148148 `addIfDifferentNeighbor`, `add`, `replace` and `doNothing`.
149149···154154 provided with '--if-missing' overrides the `trailer.ifMissing` and any
155155 applicable `trailer.<keyAlias>.ifMissing` configuration variables
156156 and applies to all '--trailer' options until the next occurrence of
157157- '--if-missing' or '--no-if-missing'. Upon encountering '--no-if-missing,
158158- clear the effect of any previous use of '--if-missing, such that the relevant
157157+ '--if-missing' or '--no-if-missing'. Upon encountering '--no-if-missing',
158158+ clear the effect of any previous use of '--if-missing', such that the relevant
159159 configuration variables are no longer overridden. Possible actions are `doNothing`
160160 or `add`.
161161