Hmm...  Looks like a unified diff to me...
The text leading up to this was:
--------------------------
|commit 5918623c5bd7fda155bf9dc3d33890c4ae1722d0
|Author: Simon Bremer <simon.bremer@tum.de>
|Date:   Thu Dec 22 17:31:07 2016 +0100
|
|    Applied and fixed autostart patch for previous version;
|
|diff --git a/dwm.c b/dwm.c
|index d27cb67..066ed71 100644
|--- a/dwm.c
|+++ b/dwm.c
--------------------------
Patching file dwm.c using Plan A...
Hunk #1 succeeded at 194.
Hunk #2 succeeded at 1387.
Hunk #3 succeeded at 2152.
done