title: Equivalent of Git's "amend last commit" in perforce
body: <p>New to Perforce. After submitting my change list, I realized that I had missed one tiny thing that's not worth writing a submit message about. Thus I submitted this change with the exact same message, thinking that it would be around the same thing as amending my last commit in Git. Evidently it wasn't, as a new revision with this absurdly tiny change was created instead.</p>
  
  <p>Is there any way to merge the two commits (on the exact same file) now that I've already submitted them both? How would I handle this situation next time?</p>