Merge pull request #1056 from duncandean/master

Change repo to repo.rb, update reset-squash-r3.png

Author: ben

book/10-git-internals/sections/packfiles.asc

@@ -58,7 +58,7 @@ At this point, modify that file a little, and see what happens:
 [source,console]
 ----
 $ echo '# testing' >> repo.rb
-$ git commit -am 'modified repo a bit'
+$ git commit -am 'modified repo.rb a bit'
 [master 2431da6] modified repo.rb a bit
  1 file changed, 1 insertion(+)
 ----