difftool reference?

Author: schacon

book/02-git-basics/sections/recording-changes.asc

@@ -366,8 +366,8 @@ index 8ebb991..643e24f 100644
  that highlights your work in progress (and note in the PR title that it's
 ----
 
-[NOTE]
 [[_git_difftool]]
+[NOTE]
 .Git Diff in an External Tool
 ====
 We will continue to use the `git diff` command in various ways throughout the rest of the book. There is another way to look at these diffs if you prefer a graphical or external diff viewing program instead. If you run `git difftool` instead of `git diff`, you can view any of these diffs in software like Araxis, emerge, vimdiff and more. Run `git difftool --tool-help` to see what is available on your system.