qenv-get_code example:   comma missing?


NOW: no comma
https://github.com/insightsengineering/teal.code/blob/0c92d78e65366018c3ac31779b4ed1b31e54db14/R/qenv-get_code.R#L39

CHANGE TO: (WITH comma)

```
#' q2 <-
#'   within(qenv(), {
#'     foo <- function() {
#'       x <<- x + 1
#'     }
#'     x <- 0
#'     foo()
#'     y <- x
#'   })
```