style: apply ruff format to SSE test files

CI was failing on ruff format --check. These 3 files were lint-clean
but not formatter-clean.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: fsecada01

tests/test_fastapi_sse.py

@@ -84,9 +84,7 @@ def test_stream_yields_multiple_frames(self, client):
             "/components/stream_counter/stream",
             json={"event": "count_up", "payload": {"steps": 3}},
         )
-        lines = [
-            ln for ln in response.text.strip().split("\n") if ln.startswith("data: ")
-        ]
+        lines = [ln for ln in response.text.strip().split("\n") if ln.startswith("data: ")]
         assert len(lines) == 4  # 3 intermediate + 1 final
         frames = [json.loads(ln.removeprefix("data: ")) for ln in lines]
         assert frames[-1]["stream_done"] is True

tests/test_litestar_sse.py

@@ -84,9 +84,7 @@ def test_stream_yields_multiple_frames(self, client):
             "/components/stream_counter/stream",
             json={"event": "count_up", "payload": {"steps": 3}},
         )
-        lines = [
-            ln for ln in response.text.strip().split("\n") if ln.startswith("data: ")
-        ]
+        lines = [ln for ln in response.text.strip().split("\n") if ln.startswith("data: ")]
         assert len(lines) == 4  # 3 intermediate + 1 final
         frames = [json.loads(ln.removeprefix("data: ")) for ln in lines]
         assert frames[-1]["stream_done"] is True

tests/test_streaming.py

@@ -142,7 +142,8 @@ async def test_no_event_single_frame(self):
     async def test_hydrate_path(self):
         comp = StepStreamComponent()
         frames = [
-            f async for f in comp.async_stream_dispatch(
+            f
+            async for f in comp.async_stream_dispatch(
                 event="process", payload={"steps": 1}, state={"step": 10, "done": False}
             )
         ]
@@ -185,13 +186,15 @@ def test_basic_format(self):
         result = format_sse_frame(frame)
         assert result.startswith("data: ")
         assert result.endswith("\n\n")
-        parsed = json.loads(result[len("data: "):])
+        parsed = json.loads(result[len("data: ") :])
         assert parsed["html"] == "<div>test</div>"
 
     def test_roundtrip_json(self):
         frame = {
-            "html": "<p>hi</p>", "state": {"count": 1},
-            "component_id": "x", "stream_done": True,
+            "html": "<p>hi</p>",
+            "state": {"count": 1},
+            "component_id": "x",
+            "stream_done": True,
         }
         result = format_sse_frame(frame)
         parsed = json.loads(result.removeprefix("data: ").strip())