Can knitr code blocks preserve blank lines when rendering?

[DavisVaughan]

I'd like to preserve the blank lines in this code block when it gets rendered, is that possible?

#' ```{r}
#' 1 + 1
#'
#' 2 + 2
#' ```

[remlapmot]

I think you can get the blank line by setting the collapse knitr chunk option

#' ```{r, collapse=TRUE}
#' 1 + 1
#'
#' 2 + 2
#' ```

There might be a way to do it with the strip.white chunk option as well.

[DavisVaughan]

Yep, collapse = TRUE does work (just confirming, even though Hadley changed it to use this already)

I'm a bit surprised strip.white = FALSE didn't work, collapse seems like a strange argument name to make this work

[hadley]

collapse = TRUE means it makes a single \preformatted{}. The default to create one \preformatted{} per input/ouput runs into the problem in your other issue.