[PATCH] Retitle 'inspecting what happened' section.

In the tutorial, there is a section entitled "Checking it out"
that shows how to use diff log and whatchanged to insect some
of the repository state.

As the phrase "checkout" ususally carries some baggage WRT
other revision control mechanism, I suggest that we re-title
this section something like "Inspecting Changes".
Signed-off-by: NJon Loeliger <jdl@freescale.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Documentation/tutorial.txt

@@ -432,8 +432,8 @@ message headers, and a few one-liners that actually do the
 commit itself (`git-commit`).
 
 
-Checking it out
----------------
+Inspecting Changes
+------------------
 
 While creating changes is useful, it's even more useful if you can tell
 later what changed. The most useful command for this is another of the