Fix formatting in README

README.md

@@ -4,7 +4,7 @@
 The GCM gem lets your ruby backend send notifications to Android and iOS devices via [
 Google Cloud Messaging](https://developers.google.com/cloud-messaging/gcm).
 
-##Installation
+## Installation
 
     $ gem install gcm
 
@@ -14,7 +14,7 @@ or in your `Gemfile` just include it:
 gem 'gcm'
 ```
 
-##Requirements
+## Requirements
 
 An Android device running 2.3 (or newer) or an iOS device and an API key as per [GCM getting started guide](https://developers.google.com/cloud-messaging/android/start).
 
@@ -25,7 +25,7 @@ One of the following, tested Ruby versions:
 * `2.2.4`
 * `2.3.0`
 
-##Usage
+## Usage
 
 For your server to send a message to one or more devices, you must first initialise a new `GCM` class with your Api key, and then call the `send` method on this and give it 1 or more (up to 1000) registration tokens as an array of strings. You can also optionally send further [HTTP message parameters](https://developers.google.com/cloud-messaging/http-server-ref) like `data` or `time_to_live` etc. as a hash via the second optional argument to `send`.
 
@@ -144,11 +144,11 @@ The guide to set up an iOS app to get notifications is here: [Setting up a GCM C
 * Only support Ruby versions [>= 1.9.3](https://www.ruby-lang.org/en/news/2014/01/10/ruby-1-9-3-will-end-on-2015/)
 * Fixed Rspec deprecation warnings for Rspec 3.0.0.beta
 
-##MIT License
+## MIT License
 
 * Copyright (c) 2016 Kashif Rasul and Shoaib Burq. See LICENSE.txt for details.
 
-##Many thanks to all the contributors
+## Many thanks to all the contributors
 
 * [Contributors](https://github.com/spacialdb/gcm/contributors)