issues with minimal R vignette

[nicholasjhorton]

See issues which led to page break:

https://cran.r-project.org/web/packages/mosaic/vignettes/MinimalRgg.pdf

[rpruim]

Are you testing with the github version of {ggformula}?

[nicholasjhorton]

No, I just stumbled on this when I was guest lecturing for a colleague.