plot_abundance_at_age facet = NULL not working

[okenk]

When I run plot_abundance_at_age() and set facet = NULL there are still facets, but if I set facet = 'none' it does work. I would have expected facet = NULL to provide the same result as 'none'

[Schiano-NOAA]

Totally get the confusion here. When setting to NULL this actually indicates to the function for it to automatically detect and select group and facet.

[okenk]

Ah, ok! Maybe that can get added to the documentation (#199 )