Fix hard line break example (commonmark#155)

JohelEGP · Ashe Connor · commit 4ee490174d0b · 2019-05-08T12:09:53.000+10:00
* Add another space so that is seems like a hard line break

* Fix example rendering
diff --git a/test/spec.txt b/test/spec.txt
@@ -9756,10 +9756,10 @@ bar</em></p>
 Line breaks do not occur inside code spans
 
 ```````````````````````````````` example
-`code 
+`code  
 span`
 .
-<p><code>code  span</code></p>
+<p><code>code   span</code></p>
 ````````````````````````````````
 
 
