Correct variable order

Fixes #835

data-transform.Rmd

@@ -324,7 +324,7 @@ See `?select` for more details.
 Instead, use `rename()`, which is a variant of `select()` that keeps all the variables that aren't explicitly mentioned:
 
 ```{r}
-rename(flights, tail_num = tailnum)
+rename(flights, tailnum = tail_num)
 ```
 
 If you want to move certain variables to the start of the data frame but not drop the others, you can do this in two ways: using `select()` in conjunction with the `everything()` helper or using `relocate()`.