[pre-commit.ci] auto fixes from pre-commit.com hooks

Author: pre-commit-ci[bot]

tests/test_primitives/test_reawaitable/test_reawaitable_concurrency.py

@@ -6,15 +6,16 @@
 
 async def sample_coro():
     await anyio.sleep(0.1)
-    return "done"
+    return 'done'
+
 
 @pytest.mark.anyio
 async def test_concurrent_awaitable():
     reawaitable = ReAwaitable(sample_coro())
 
     async def await_reawaitable():
         return await reawaitable
+
     async with anyio.create_task_group() as tg:
         task1 = tg.start_soon(await_reawaitable)
         task2 = tg.start_soon(await_reawaitable)
-