Update iteration.qmd

Not sure what "Vs" is supposed to mean. Perhaps "Versus?" In any case, "Compare with" seems better.

iteration.qmd

@@ -323,7 +323,7 @@ diamonds |>
   summarize_means(c(carat, x:z))
 ```
 
-### Vs `pivot_longer()`
+### Compare with `pivot_longer()`
 
 Before we go on, it's worth pointing out an interesting connection between `across()` and `pivot_longer()` (@sec-pivoting).
 In many cases, you perform the same calculations by first pivoting the data and then performing the operations by group rather than by column.