Fix CI: ruff format + enhance sdist verification

- Format files flagged by CI lint workflow
- Add model loading check to sdist build verification
- Verify from_pretrained works in installed package

Author: neluca

.github/workflows/python-package.yml

@@ -81,7 +81,7 @@ jobs:
       - name: Install from sdist
         run: |
           pip install dist/*.tar.gz
-      - name: Verify import
+      - name: Verify import and model loading
         run: |
           cd /tmp
-          python -c "import tinybpe; print(tinybpe.__version__)"
+          python -c "import tinybpe; print(tinybpe.__version__); print(tinybpe.list_models()); from tinybpe import Tokenizer; tok = Tokenizer.from_pretrained('cl100k_base'); print(len(tok.encode('hello world')))"

tests/test_hf_models.py

@@ -186,8 +186,6 @@ def test_code_text(self):
         assert decoded == code
 
 
-
-
 @pytest.mark.skipif(not HAS_HF, reason="huggingface_hub not installed")
 class TestDeepSeekSpecific:
     """DeepSeek-V4 tokenizer specific tests.

tinybpe/_registry.py

@@ -38,6 +38,7 @@ class ModelInfo(TypedDict):
 # Load registry from JSON
 # ---------------------------------------------------------------------------
 
+
 def _load_registry() -> tuple[dict[str, ModelInfo], dict[str, str | None]]:
     """Load model registry and pattern definitions from ``models/models.json``.