Remove third slash in "file:///"

README.md

@@ -40,7 +40,7 @@ A small list of "gotchas" are provided below for designers and developers starti
     - Enable touch event emulation in Chrome (found in the overrides tab in the web inspector preferences)
     - Use a JavaScript library like fingerblast.js to emulate touch events (ideally only loaded from desktop devices)
 - Script tags containing JavaScript will not be executed on pages that are loaded with push.js. If you would like to attach event handlers to elements on other pages, document-level event delegation is a common solution.
-- Ratchet uses XHR requests to fetch additional pages inside the application. Due to security concerns, modern browsers prevent XHR requests when opening files locally (aka using the file:/// protocol); consequently, Ratchet does not work when opened directly as a file.
+- Ratchet uses XHR requests to fetch additional pages inside the application. Due to security concerns, modern browsers prevent XHR requests when opening files locally (aka using the file:// protocol); consequently, Ratchet does not work when opened directly as a file.
     - A common solution to this is to simply serve the files from a local server. One convenient way to achieve this is to run ```python -m SimpleHTTPServer <port>``` to serve up the files in the current directory to ```http://localhost:<port>```
 
 ## Versioning