On page: http://git-scm.com/book/en/Git-Basics-Undoing-Things
The line: "What if you realize that you don’t want to keep your changes to the benchmarks.rb file? How can you easily unmodify it — revert it back to what it looked like when you last committed (or initially cloned, or however you got it into your working directory)?"
Should be: "What if you realize that you don’t want to keep your changes to the benchmarks.rb file? How can you easily unmodify it — revert to what it looked like when you last committed (or initially cloned, or however you got it into your working directory)?"
"revert back" is redundant. You can't revert forward.
Cheers.