diff --git a/refactoring.html b/refactoring.html
index e30e0c5..8a1b621 100755
--- a/refactoring.html
+++ b/refactoring.html
@@ -230,13 +230,13 @@ FAILED (errors=3)</samp></pre>
 <p class=d>[<a href=examples/roman9.py>download <code>roman9.py</code></a>]
 <pre class=pp><code>roman_numeral_pattern = re.compile('''
     ^                   # beginning of string
-<a>    M{0,4}              # thousands - 0 to 4 M's  <span class=u>&#x2460;</span></a>
-    (CM|CD|D?C{0,3})    # hundreds - 900 (CM), 400 (CD), 0-300 (0 to 3 C's),
-                        #            or 500-800 (D, followed by 0 to 3 C's)
-    (XC|XL|L?X{0,3})    # tens - 90 (XC), 40 (XL), 0-30 (0 to 3 X's),
-                        #        or 50-80 (L, followed by 0 to 3 X's)
-    (IX|IV|V?I{0,3})    # ones - 9 (IX), 4 (IV), 0-3 (0 to 3 I's),
-                        #        or 5-8 (V, followed by 0 to 3 I's)
+<a>    M{0,4}              # thousands - 0 to 4 Ms  <span class=u>&#x2460;</span></a>
+    (CM|CD|D?C{0,3})    # hundreds - 900 (CM), 400 (CD), 0-300 (0 to 3 Cs),
+                        #            or 500-800 (D, followed by 0 to 3 Cs)
+    (XC|XL|L?X{0,3})    # tens - 90 (XC), 40 (XL), 0-30 (0 to 3 Xs),
+                        #        or 50-80 (L, followed by 0 to 3 Xs)
+    (IX|IV|V?I{0,3})    # ones - 9 (IX), 4 (IV), 0-3 (0 to 3 Is),
+                        #        or 5-8 (V, followed by 0 to 3 Is)
     $                   # end of string
     ''', re.VERBOSE)