Eric, this is the link to the original patch which is well formatted:
http://marc.info/?l=xen-devel&m=146815138831762&w=2

I think that the formatting and s-o-b was broken in the reply from Quan.
On Jul 18, 2016 17:57, "Eric Blake" <eblake@redhat.com> wrote:

> On 07/17/2016 01:41 AM, Quan Xu wrote:
> >
> > [Quan:]: comment starts with [Quan:]
> >
>
> This line doesn't belong in a commit message; it's fine to put it after
> the --- separator though, if it aids mailing list reviewers.
>
> >
> > The purpose of the new file is to store generic functions shared by
> frontendand backends such as xenstore operations, xendevs.
> >
>
> s/frontendand/front end and/
>
> Please wrap your commit message lines.  Since 'git log' displays logs
> with indentation, wrapping around 72 characters is ideal.
>
> > Signed-off-by: Quan Xu <quan.xu@xxxxxxxxx>
> > Signed-off-by: Emil Condrea <emilcondrea@xxxxxxxxx>
>
> These are not valid S-o-b, therefore this patch cannot be applied as-is.
>
>
> > -int xenstore_read_int(const char *base, const char *node, int *ival)
> > -{
> > -    char *val;
> > -    int rc = -1;
> > -
> > -    val = xenstore_read_str(base, node);
> > [Quan:]:  IMO, it is better to initialize val when declares.  the same
> comment for the other 'val'
> > -    if (val && 1 == sscanf(val, "%d", ival)) {
>
> This is not a valid patch.  Are you replying to a patch that someone
> else posted? If so, your quoting style is VERY difficult to read.
> Please consider using a leading > before every line that you are quoting
> (rather than pasting it verbatim as if you had written it), and include
> a blank line both before and after every line that you insert, to call
> visual attention to what is your reply vs. what you are quoting.
>
>
> --
> Eric Blake   eblake redhat com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>
>