[commit - obvious] Fixed a couple of ChangeLog entries

[Doug Evans]

On Wed, Apr 11, 2012 at 11:26 PM, Siva Chandra <sivachandra@google.com> wrote:
> On Wed, Apr 11, 2012 at 11:24 PM, Sergio Durigan Junior
> <sergiodj@redhat.com> wrote:
>> Please, send patches using the unified diff format, as they are much
>> easier to understand.
>
> I have been following this guideline in CONTRIBUTE:
>
>      If you are accessing the CVS repository use
>      "cvs update; cvs diff -cp"; else, use "diff -cp OLD NEW" or
>      "diff -up OLD NEW".
>
> Should this be changed to "cvs diff -cup" instead?

Maybe just add a note saying -up is preferred?