add missing backticks

diff --git a/docs/pages/reveal.md b/docs/pages/reveal.md
index 03cf30943bf19ea8517036c9a0bfe7055c7ea9ff..481b3799fa66e3bcb8d9f7f74d7b351906af213b 100644 (file)
--- a/docs/pages/reveal.md
+++ b/docs/pages/reveal.md
@@ -64,7 +64,7 @@ You can use our handy [close button](close-button.html) styles to do this:
 
 ## Sizing
 
-On small screens, a modal is always 100% of the width of the screen. On medium-sized screens and larger, the width changes to 600px (see the $reveal-width setting).
+On small screens, a modal is always 100% of the width of the screen. On medium-sized screens and larger, the width changes to 600px (see the `$reveal-width` setting).
 
 The size of a modal can be changed with these sizing classes, which are added to the modal container: