Nothing
Before rmarkdown 0.9.2, an error would occur:
Error in dir.exists: object 'resource_folder' not found
To repro:
devtools::install_version('rmarkdown', '0.9.2')
And run this document.
rm(list = ls()) shinyApp( ui = basicPage('Hello world'), server = function(input, output) { } )
This issue was fixed in https://github.com/rstudio/rmarkdown/pull/624, and again in https://github.com/rstudio/rmarkdown/commit/67eaa7aa6a.
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