Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|From 7ef1d5edfd6bd9c932452ac2fb2010c8e0d8c1c7 Mon Sep 17 00:00:00 2001
|From: Felix Van der Jeugt <felix.vanderjeugt@gmail.com>
|Date: Wed, 19 Oct 2016 22:18:21 +0200
|Subject: [PATCH] tabcomplete with longest common prefix
|
|---
| dmenu.c | 30 +++++++++++++-----------------
| 1 file changed, 13 insertions(+), 17 deletions(-)
|
|diff --git a/dmenu.c b/dmenu.c
|index 9278e91..40e717c 100644
|--- a/dmenu.c
|+++ b/dmenu.c
--------------------------
Patching file dmenu.c using Plan A...
Hunk #1 succeeded at 208 (offset -10 lines).
Hunk #2 succeeded at 217 with fuzz 1 (offset -10 lines).
Hunk #3 succeeded at 230 (offset -10 lines).
Hunk #4 succeeded at 239 (offset -10 lines).
Hunk #5 succeeded at 272 (offset -10 lines).
Hunk #6 succeeded at 428 (offset -10 lines).
Hmm...  Ignoring the trailing garbage.
done