From 9ad6fb22d50c0be602906c4b0ec832be7fd9d364 Mon Sep 17 00:00:00 2001
From: Matthew Feickert <matthew.feickert@cern.ch>
Date: Sun, 21 Oct 2018 17:04:55 -0500
Subject: [PATCH] Have Black check also show the diff

If Black detecs the need to format a file it will show the relevant diff
---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 6a378befb1..730f7fd5ee 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ install:
 script:
   - pyflakes pyhf
   - pytest -r sx --ignore tests/benchmarks/ --ignore tests/test_notebooks.py
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then black --check --verbose .; fi
+  - if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then black --check --diff --verbose .; fi
 after_success: coveralls
 
 # always test (on both 'push' and 'pr' builds in Travis)