Check: re-building of vignette outputs
Error(s) in re-building vignettes:
Error: '\R' is an unrecognized escape in character string starting
using R Under development (unstable) (2019-01-04 r75947)
using platform: x86_64-w64-mingw32 (64-bit)
using session charset: ISO8859-1
I have not attempted to narrow down exactly when this was introduced
(maybe it's related to the recent updates to how vignette are built).