use knitr "message" rather than "messages" to set chunk message behavior
use knitr "message" rather than "messages" to set chunk message behavior

JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio