dataset formatting, episode 7

_episodes_rmd/07-hierarchical.Rmd

@@ -103,7 +103,7 @@ knitr::include_graphics("../fig/hierarchical_clustering_2.png")
 
 To motivate this lesson, let's first look at an example where hierarchical
 clustering is really useful, and then we can understand how to apply it in more
-detail. To do this, we'll return to the large methylation dataset we worked
+detail. To do this, we'll return to the large `methylation` dataset we worked
 with in the regression lessons. Let's load the data and look at it.
 
 ```{r}