test: run black in check mode as part of ./check

Life is too short to format code by hand.

1 files changed, 2 insertions, 0 deletions

diff --git a/check b/check
index 4e4f4d0..cde86a6 100755
--- a/check
+++ b/check
@@ -2,4 +2,6 @@
 
 set -eu
 
+rm -f test.py
+black --check contractor *.py
 CONTRACTOR_ADDRESS="$1" sp-codegen contractor.md -o test.py --run