[CI] Code style is checked with black (#15)

* Reformatting (black)

* [CI] Check code style with black

Author: dmitry-lipetsk

.github/workflows/package-verification.yml

@@ -27,13 +27,16 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install flake8 flake8-pyproject ruff
+        python -m pip install flake8 flake8-pyproject ruff black
     - name: Lint with flake8
       run: |
         flake8 .
     - name: Lint with ruff
       run: |
         ruff check .
+    - name: Check with black
+      run: |
+        black --check .
 
   test:
     runs-on: ubuntu-latest

tests/units/exceptions/Exception/test_set001__research.py

@@ -1,5 +1,3 @@
-
-
 class TestSet002__usage:
     def test_000__research(self):
         e = Exception("a\n1")