backup_rstudio_snippets() creates a back-up of snippets file.
list_snippet_file_backups() lists the names of current file with snippets
and its back-ups.
remove_snippet_backup_duplicates() removes duplicated backup files.
backup_rstudio_snippets(type)
list_snippet_file_backups(type = get_default_snippet_types())
open_snippets_backup_dir()
remove_snippet_backup_duplicates()if (FALSE) {
backup_rstudio_snippets("r")
backup_rstudio_snippets("markdown")
list_snippet_file_backups("r")
}