Line highlight plugin
Arguments
- range
- A character indicating the range to be used, for example 2-5 will highlight from 2 up to 5. Also you can highlight two or more ranges in the following way 2-5,10-13,19. 
Examples
if (interactive()) {
  highlighter::highlighter(
    "print('Hello, world!')\ncat <- \"Aristofanes\"\nstr(some_variable)",
    language = "r",
    plugins = list(
      highlight(
        range = "1-2"
      )
    )
  )
}