pw: improve pw-pull pull request template message

Example output:

---
Subject: pull-request: bpf-next 2019-10-16

Hi David,

The following pull-request contains BPF updates for your *net-next* tree.

We've added 10 non-merge commits during the last 1 day(s) which contain
a total of 23 files changed, 413 insertions(+), 90 deletions(-).

The main changes are:

1) ..., from XYZ. Among others:

    - Blah blah sub item.

2) ..., from ABC.

Please consider pulling these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git

Thanks a lot!

Contributors in this PR are:

Andrii Nakryiko, Jakub Sitnicki, Jiri Pirko, Song Liu, Stanislav Fomichev

Thanks everyone!
---

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
1 file changed