one result per python block

Author: tschm

tests/test_readme.py

@@ -24,8 +24,9 @@ def test_readme_runs():
     result_blocks = RESULT.findall(readme_text)
 
     # Optional: keep docs and expectations in sync.
-    assert len(code_blocks) == len(result_blocks), "Mismatch between python and result blocks in README.md"
-
+    assert len(code_blocks) == len(result_blocks), (
+        "Mismatch between python and result blocks in README.md"
+    )
     code = "".join(code_blocks)  # merged code
     expected = "".join(result_blocks)