Closure: attempt to fix up closure_compilation.md rendering

docs/closure_compilation.md

 # Closure Compilation
 
 ## I just need to fix the compile!
 
 ### Pre-requisites
 
 You'll need Java 7 (preferably the OpenJDK version).  To install on Ubuntu:
+
 ```shell
 sudo apt-get install openjdk-7-jre
 ```
 
 On Mac or Windows, visit:
 [http://www.oracle.com/technetwork/java/javase/downloads/index.html](http://www.oracle.com/technetwork/java/javase/downloads/index.html)
 
 ### Using ninja to compile the code
 
 We use GYP and ninja as our build system. To generate the ninja files from GYP:
+
 ```shell
 # notice the 2 in compiled_resources.gyp
 GYP_GENERATORS=ninja tools/gyp/gyp --depth . third_party/closure_compiler/compiled_resources2.gyp
 ```
 
 To compile the JavaScript:
+
 ```shell
 ninja -C out/Default -j4
 ```
 
 The output should look something like this:
+
 ```shell
 ninja: Entering directory `out/Default/'
 [30/106] ACTION Compiling chrome/browser/resources/md_history/constants.js
 ```
 
 To generate and run the **deprecated** v1 gyp format, remove the "2" from "compiled_resources2.gyp":
+
 ```shell
 $ GYP_GENERATORS=ninja tools/gyp/gyp --depth . third_party/closure_compiler/compiled_resources.gyp
 ```
 
 Compiling works the same way for both v1 and v2 systems:
+
 ```shell
 ninja -C out/Default -j4
 ```
 
 ## Background
 
 In C++ and Java, compiling the code gives you _some_ level of protection against
 misusing variables based on their type information. JavaScript is loosely typed
 and therefore doesn't offer this safety. This makes writing JavaScript more
 error prone as it's _one more thing_ to mess up.
@@ skipping 251 matching lines @@
           'jscomp_error=duplicate',
           'jscomp_error=misplacedTypeAnnotation',
         ],
         'disabled_closure_args': [], # remove the disabled closure args for more strict compilation
       },
       'includes': ['../third_party/closure_compiler/compile_js.gypi'],
     },
   ],
 }
 ```