title: Git-Diff vs. Git-log? What's the difference?
body: <p>I'm a little bit confused about Git. When I'm looking through the manual it appears the Diff is included in the Git-log manual. Also when I'm looking at tutorials and stuff, I find that Git log does much of the same stuff git-diff does. Is Git-Diff's functionality just a subset of Git-log?</p>
  
  <p>Thanks!</p>