title: In source tree, which is "mine" and which is "theirs" in merge diff?
body: <p>I'm merging two branches. I assume I'm on <em>HEAD</em> branch right now. When I only want to pick one branche's version of the file. The one I want to pick depends on the contents, not on the branch.  </p>
  
  <p>For example on the image below I want to pick the second line:</p>
  
  <p><img src="https://i.stack.imgur.com/k67b3.png" alt="In source"></p>
  
  <p>But from which line does the second line come? I do not really understand the output of the program here.</p>