remove redundant whitespace

Author: graingert

.github/workflows/test.yml

@@ -43,7 +43,7 @@ jobs:
     # https://github.community/t/is-it-possible-to-require-all-github-actions-tasks-to-pass-without-enumerating-them/117957/4?u=graingert
     runs-on: ubuntu-latest
     needs: [test]
-    steps: 
+    steps:
     - name: Set up Python
       uses: actions/setup-python@v2
       with: