documentation: add brief mention of cat-file to tutorial part I

I'd rather avoid git cat-file so early on, but the

	git-cat-file -p old-commit:/path/to/file

trick is too useful....

Also fix a nearby typo while we're at it.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/tutorial.txt b/Documentation/tutorial.txt
index 5fdeab9..039a859 100644 (file)
--- a/Documentation/tutorial.txt
+++ b/Documentation/tutorial.txt
@@ -435,12 +435,18 @@ adjust gitk's fonts by holding down the control key while pressing
 
 Finally, most commands that take filenames will optionally allow you
 to precede any filename by a commit, to specify a particular version
-fo the file:
+of the file:
 
 -------------------------------------
 $ git diff v2.5:Makefile HEAD:Makefile.in
 -------------------------------------
 
+You can also use "git cat-file -p" to see any such file:
+
+-------------------------------------
+$ git cat-file -p v2.5:Makefile
+-------------------------------------
+
 Next Steps
 ----------