fs:setlineAdd a (name, value) pair to a line based file, or update an existing (name, value) pair.
file: The path to a line based fileoption-name: The name in a (name, value) pairoption-value: The value in a (name, value) pair--separator: Characters which separate the name from the value in a (name, value) pair.--compare-values: Prevent duplicate lines as normal, but compare the contents of the "value" field instead of the "name" field.--check: Do not actually make any changes, but report whether or not a change would be made.