title: how to add space after symbol while I'm typing in sublime text 2
body: <p>I want to add space to separate symbols when writing code. And I'm using Sublime Text 2</p>
  
  <p>For example the code A is better than B:</p>
  
  <p>A:</p>
  
  <pre><code>a = [1, 2, 3, 4, 5]
  b = {'name': 'Tom', 'age': 23}
  c = 12 + 23 - 1
  </code></pre>
  
  <p>B:</p>
  
  <pre><code>a=[1,2,3,4,5]
  b={'name':'Tom','age':23}
  c=12+23-1
  </code></pre>
  
  <p>But I have to type a lot of space, which is very boring.</p>
  
  <p>In <strong>Sublime Text 2</strong>, how can I do this <strong>automatically</strong> when typing? Or is there any suggested plugin?</p>