Merge pull request #832 from craigcitro/patch-1

tweak layout in readme installation markup

README.md

@@ -878,28 +878,28 @@ Some reveal.js features, like external markdown and speaker notes, require that
 2. Install [Grunt](http://gruntjs.com/getting-started#installing-the-cli)
 
 4. Clone the reveal.js repository
-```sh
-$ git clone https://github.com/hakimel/reveal.js.git
-```
+ ```sh
+ $ git clone https://github.com/hakimel/reveal.js.git
+ ```
 
 5. Navigate to the reveal.js folder
-```sh
-$ cd reveal.js
-```
+ ```sh
+ $ cd reveal.js
+ ```
 
 6. Install dependencies
-```sh
-$ npm install
-```
+ ```sh
+ $ npm install
+ ```
 
 7. Serve the presentation and monitor source files for changes
-```sh
-$ grunt serve
-```
+ ```sh
+ $ grunt serve
+ ```
 
 8. Open <http://localhost:8000> to view your presentation
 
-You can change the port by using `grunt serve --port 8001`.
+ You can change the port by using `grunt serve --port 8001`.
 
 
 ### Folder Structure