git-diff shows none, even before ./bootstrap

[jidanni]

Following the instructions in Reading README-hacking,
$ ./bootstrap 
Error: 'autoconf' not found ...
Well, rather then installing all those boring packages, I just skipped down to
> At this point, there should be no difference between your local copy,
> and the GIT master copy:
>        $ git diff
> should output no difference.
Ha ha, it shows no difference already,
$ git-diff|wc
      0       0       0
and you wanted to fool me into installing all those debs just to make
a documentation patch! So README-hacking had better say better what
the goal of those steps I skipped are. I mean, taking those steps
could only make my perfect 0 0 0 less perfect. P.S. I used git-clone
--depth 1 as you never know how big it will be without looking in the
docs first, which you have to download first:
http://article.gmane.org/gmane.comp.version-control.git/103218