/usr/lib/R/site-library/R6/doc/ is in r-cran-r6 2.2.0-2.
This file is owned by root:root, with mode 0o755.
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/usr/lib/R/site-library/R6/doc/Debugging.R
/usr/lib/R/site-library/R6/doc/Debugging.Rmd
/usr/lib/R/site-library/R6/doc/Debugging.html
/usr/lib/R/site-library/R6/doc/Introduction.R
/usr/lib/R/site-library/R6/doc/Introduction.Rmd
/usr/lib/R/site-library/R6/doc/Introduction.html
/usr/lib/R/site-library/R6/doc/Performance.R
/usr/lib/R/site-library/R6/doc/Performance.Rmd
/usr/lib/R/site-library/R6/doc/Performance.html
/usr/lib/R/site-library/R6/doc/Portable.R
/usr/lib/R/site-library/R6/doc/Portable.Rmd
/usr/lib/R/site-library/R6/doc/Portable.html
/usr/lib/R/site-library/R6/doc/index.html