Fix typo in markdown

In 817d004 this got messed up.

Signed-off-by: Ben Hale <bhale@pivotal.io>

[resolves cloudfoundry#682]

docs/jre-zulu_jre.md

@@ -123,8 +123,7 @@ The amount of memory that should be allocated to stacks is given as an amount of
 stack_threads: 500
 ```
 
-Note that the default value of 250 threads is optimized for a default Tomcat configuration.  If you are using another container, especially something non-blocking like Netty, it's more appropriate to use a significantly smaller value.  Typically 25 threads would cover the needs of both the server (Netty) and the threads started by the JVM itself.hreads: 500
-```
+Note that the default value of 250 threads is optimized for a default Tomcat configuration.  If you are using another container, especially something non-blocking like Netty, it's more appropriate to use a significantly smaller value.  Typically 25 threads would cover the needs of both the server (Netty) and the threads started by the JVM itself.
 
 #### Java Options