Warning "storing paths of more than 100 bytes is not portable" on R CMD build

[yutannihilation]

Just for sharing. This isn't a very big problem, but I feel it's nice if vdiffr handles this internally by limiting the filename (e.g. truncating the filename to 50 characters and appending the hash to avoid name collision).

c.f. tidyverse/ggplot2#4878

[hadley]

I guess I'm not sure that this is testthat's problem giving that the usual snapshot path is based on the test path, which shouldn't be that long?