Merge pull request #33 from schacon/chapter-3-updates

Chapter 3 updates

Author: ben

en/book/02-git-basics/chapter2.asc

@@ -769,10 +769,12 @@ image::images/18333fig0202-tn.png[The gitk history visualizer.]
 
 You can see the commit history in the top half of the window along with a nice ancestry graph. The diff viewer in the bottom half of the window shows you the changes introduced at any commit you click.
 
+[[_undoing]]
 === Undoing Things
 
 At any stage, you may want to undo something. Here, we’ll review a few basic tools for undoing changes that you’ve made. Be careful, because you can’t always undo some of these undos. This is one of the few areas in Git where you may lose some work if you do it wrong.
 
+[[_reset]]
 ==== Reset Demystified
 
 **TODO**