typos

diff --git a/exercises/_assignment4.mdwn b/exercises/_assignment4.mdwn
index bb67eb4..6c92b54 100644 (file)
--- a/exercises/_assignment4.mdwn
+++ b/exercises/_assignment4.mdwn
@@ -2,8 +2,9 @@
 
 ## Basic fixed points ##
 
-1. Recall that `ω := \f.ff`, and `Ω := ω ω`.
-Is Ω a fixed point for ω?  Find a fixed point for ω,
+1. Recall that <code>&omega; := \f.ff</code>, and <code>&Omega; :=
+&omega; &omega;</code>.  Is <code>&Omega;</code> a fixed point for
+<code>&omega;</code>?  Find a fixed point for <code>&omega;</code>,
 and prove that it is a fixed point.
 
 ## Arithmetic infinity? ##