Document that run_diffoscope should not be considered a stable API.

4 jobs for master in 20 minutes and 36 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #197170
allowed to fail
stable-bpo

00:01:38

passed #197169
testing

00:20:32

88.0%
failed #197171
allowed to fail
ubuntu-devel

00:09:14

passed #197168
unstable

00:20:36

88.0%
 
Name Stage Failure
failed
ubuntu-devel Test
done.
done.
Processing triggers for libgdk-pixbuf2.0-0:amd64 (2.38.1+dfsg-1) ...
Errors were encountered while processing:
linux-firmware
linux-image-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
E: Failed to process build dependencies
ERROR: Job failed: exit code 1
failed
stable-bpo Test
               Depends: unzip but it is not going to be installed
Depends: xmlbeans but it is not going to be installed
Depends: xxd but it is not going to be installed or
vim-common but it is not going to be installed
builddeps:essentials : Depends: build-essential but it is not going to be installed

W: Encountered an unexpected section with 1 fields: Message: (UNSAT) No Solutions according to the given preferences
E: Broken packages
ERROR: Job failed: exit code 1