I was trying to understand why all the bots failed here in
https://codereview.chromium.org/2494063002/#ps40001
which is only moving docs around.

patch_failure failed, it seems a conflict. Good.
Now I want to understand what did conflict and why. Here's the problem:
I don't see any useful information in the stdout of the failing step.

For instance 
https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Ftryserver.chromium.linux%2Flinux_chromium_clobber_rel_ng%2F270370%2F%2B%2Frecipes%2Fsteps%2FPatch_failure%2F0%2Fstdout

Form what I see this thing is telling me that:
- The command being executed was: cmd: ['python', '-u', '/tmp/tmpcaGumx.py']
- That thing returned exit code 1.

Could this thing be a be a bit less cryptical and more verbose?
As it is, this doesn't give me any clue about what's going on.