For an output file FOO.html, FOO.md should be deleted if
FOO.Rmd exists, and FOO.html should be deleted when
FOO.Rmarkdown exists (because FOO.Rmarkdown should generate
FOO.markdown instead) or neither FOO.Rmarkdown nor
FOO.Rmd exists (because a plain Markdown file should not be knitted to
HTML).
clean_duplicates(preview = TRUE)For preview = TRUE, a logical vector indicating if each file
was successfully deleted; for preview = FALSE, the file list is
printed.
Whether to preview the file list, or just delete the files. If
you are sure the files can be safely deleted, use preview = FALSE.