title: git rebase - does pick effectively do nothing?
body: <p>Say I want to do an interactive <code>git rebase</code>. </p>
  
  <p>I use <code>git rebase -i HEAD~2</code> and end up in the editor with 2 lines starting with <code>pick</code>. If I go ahead and exit the editor then I get the message <code>Successfully rebased and updated refs/heads/master.</code>.</p>
  
  <p>The last few commits all seem identical. So, am I right that, in this case, if I simply use <code>pick</code> then I am not making any change to the history of my git project?</p>