Merge branch 'main' into fallbacks

Author: krlmlr

vignettes/fallback.Rmd

@@ -88,7 +88,7 @@ The `last_rel()` function shows the last relation that has been materialized:
 duckplyr::last_rel()
 ```
 
-It is NULL because nothing has been computed yet.
+It is `NULL` because nothing has been computed yet.
 Converting the object to a data frame triggers the computation:
 
 ```{r}