Fix the last test case in latex-math.txt.
diff --git a/test/latex-math.txt b/test/latex-math.txt
index 21a7303..5547c8f 100644
--- a/test/latex-math.txt
+++ b/test/latex-math.txt
@@ -21,12 +21,14 @@ This is a display equation: $$\int_a^b x dx$$.
<p>This is a display equation: <equation type="display">\int_a^b x dx</equation>.</p>
````````````````````````````````
-Math spans may span multiple lines as they are normal spans.
+Math spans may span multiple lines as they are normal spans:
```````````````````````````````` example
$$
-\int_a^b f(x) dx
+\int_a^b
+f(x) dx
$$
+.
<p><equation type="display">\int_a^b f(x) dx </equation></p>
````````````````````````````````