Non-existent file inc/setting_sets.gms

Help text for command line arguments (Backbone.gms, section Gams command line arguments) refers to non-existent file inc/setting_sets.gms, see below.

--<name of model parameter>=<value>
    Set model parameter value. See file ‘inc/setting_sets.gms’ for available
    parameters.

--<name of model feature>=[yes|no]
    Switch model features on/off. See file ‘inc/setting_sets.gms’ for available
    features.

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