refactor(knowledge-base mcp server): adjust formatting for consistency and readability

Improved code formatting, line breaks, and indentation across chunking logic and multiple test modules to enhance code clarity and maintain consistent style. No functional changes made.

mcp-servers/knowledge-base/tests/conftest.py

@@ -83,7 +83,9 @@ def mock_embeddings():
         return [0.1] * 1536
 
     mock_emb.generate = AsyncMock(return_value=fake_embedding())
-    mock_emb.generate_batch = AsyncMock(side_effect=lambda texts, **_kwargs: [fake_embedding() for _ in texts])
+    mock_emb.generate_batch = AsyncMock(
+        side_effect=lambda texts, **_kwargs: [fake_embedding() for _ in texts]
+    )
 
     return mock_emb
 
@@ -137,7 +139,7 @@ async def async_function() -> None:
 @pytest.fixture
 def sample_markdown():
     """Sample Markdown content for chunking tests."""
-    return '''# Project Documentation
+    return """# Project Documentation
 
 This is the main documentation for our project.
 
@@ -182,20 +184,20 @@ The search endpoint allows you to query the knowledge base.
 ## Contributing
 
 We welcome contributions! Please see our contributing guide.
-'''
+"""
 
 
 @pytest.fixture
 def sample_text():
     """Sample plain text for chunking tests."""
-    return '''The quick brown fox jumps over the lazy dog. This is a sample text that we use for testing the text chunking functionality. It contains multiple sentences that should be properly split into chunks.
+    return """The quick brown fox jumps over the lazy dog. This is a sample text that we use for testing the text chunking functionality. It contains multiple sentences that should be properly split into chunks.
 
 Each paragraph represents a logical unit of text. The chunker should try to respect paragraph boundaries when possible. This helps maintain context and readability.
 
 When chunks need to be split mid-paragraph, the chunker should prefer sentence boundaries. This ensures that each chunk contains complete thoughts and is useful for retrieval.
 
 The final paragraph tests edge cases. What happens with short paragraphs? Do they get merged with adjacent content? Let's find out!
-'''
+"""
 
 
 @pytest.fixture