fixed some style issues

pipenv/cli.py

@@ -480,7 +480,6 @@ def do_lock(no_hashes=True):
             if not no_hashes:
                 lockfile['default'][dep['name']]['hash'] = dep['hash']
 
-
         # Write out the lockfile.
         with open(project.lockfile_location, 'w') as f:
             json.dump(lockfile, f, indent=4, separators=(',', ': '), sort_keys=True)

test_windows/test_basic.py

@@ -12,4 +12,4 @@ class TestPipenv():
 
     def test_lock(self):
         c = delegator.run('pipenv lock')
-        assert c.return_code == 0
+        assert c.return_code == 0