Apply suggestions from code review

Co-authored-by: Hadley Wickham <h.wickham@gmail.com>

vignettes/wrappers.Rmd

@@ -67,7 +67,7 @@ sw_meta <- list(
 
 Define a custom glue wrapper and use it inside another helper that generates `\item` entries[^1]:
 
-[^1]: We're using `<@` and `@>` as the delimiters because this vignette is authored using R Markdown and knitr. The delimiters `<<` and ``>>` actually have special meaning in knitr, so it was easiest to use something else.
+[^1]: Note that delimiters `<<` and ``>>` have special meaning in knitr, so if you're generating output for RMarkdown or Quarto, you should avoid them.
 
 ```{r}
 my_glue = function(...) {
@@ -113,7 +113,7 @@ glue(..., .envir = parent.frame(), ...)
 
 The expressions inside a glue string are evaluated with respect to `.envir`, which defaults to the environment where `glue()` is called from.
 
-Everything is simple when evaluating `glue()` in the global environment.
+Everything is simple when evaluating `glue()` in the global environment:
 
 ```{r}
 x <- 0