Separating code for copy-paste in PR

setup.md

@@ -179,7 +179,8 @@ you must install the software described below.
     to format lessons written in R Markdown,
     so you will need to install these to build R lessons
     (and this example lesson). The best way to install these packages is to open an R window and type:
-    "> install.packages('package_name', dependencies = TRUE)" Substitute the 'package_name' with
+    `> install.packages('package_name', dependencies = TRUE)`
+    Substitute the 'package_name' with
     either 'knitr', 'stringer', and then 'checkpoint'.
 
 If you want to run `bin/lesson_check.py` (which is invoked by `make lesson-check`)