diff --git a/book/06-github/sections/2-contributing.asc b/book/06-github/sections/2-contributing.asc
index a0a5a4eb3..3557b73f6 100644
--- a/book/06-github/sections/2-contributing.asc
+++ b/book/06-github/sections/2-contributing.asc
@@ -71,9 +71,9 @@ $ cd blink
 $ git checkout -b slow-blink <2>
 Switched to a new branch 'slow-blink'
 
-$ sed -i '' 's/1000/3000/' blink.ino <3> (MacOSX)
+$ sed -i '' 's/1000/3000/' blink.ino (MacOSX) <3>
 # If you're on a Linux system, do this instead:
-# $ sed -i 's/1000/3000/' blink.ino
+# $ sed -i 's/1000/3000/' blink.ino <3>
 
 $ git diff --word-diff <4>
 diff --git a/blink.ino b/blink.ino