recordr
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Fix vignettes/intro_recordr.Rmd
This vignette produces an error when run through knitr:
Line 83 Error in .External2(C_savehistory, file) : no history available to save ...
The relevant R code from the vignette (chunk "console session") runs fine from the "rstudio -> run chunk" menu.
This may have something to do with the knitr caching mechanism.