title: Xcode repository indicators meanings
body: <p>I wonder what these shortcuts mean and since I already can figure out that "shortcut" is not the right word for it, I don't even know what to google so I'll just strike a question here.</p>
  
  <p>Here's the screenshot:
  <img src="https://i.stack.imgur.com/IEBnf.png" alt="enter image description here"></p>
  
  <p>So, what does M, A, ? and all other shortcuts mean exactly ?</p>