boilerplate_test: fix bad indentation

hack/boilerplate/boilerplate_test.py

@@ -20,6 +20,7 @@ from io import StringIO
 import os
 import sys
 
+
 class TestBoilerplate(unittest.TestCase):
     """
     Note: run this test from the hack/boilerplate directory.
@@ -48,5 +49,4 @@ class TestBoilerplate(unittest.TestCase):
 
         sys.stdout = old_stdout
 
-    self.assertEqual(
-        output, ['././fail.go', '././fail.py'])
+        self.assertEqual(output, ["././fail.go", "././fail.py"])